/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:14:28,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:14:28,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:14:28,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:14:28,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:14:28,733 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:14:28,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:14:28,734 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:14:28,734 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:14:28,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:14:28,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:14:28,737 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:14:28,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:14:28,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:14:28,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:14:28,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:14:28,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:14:28,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:14:28,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:14:28,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:14:28,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:14:28,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:14:28,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:14:28,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:14:28,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:14:28,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:14:29,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:14:29,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:14:29,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:14:29,076 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:14:29,077 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:14:29,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2021-06-05 22:14:29,078 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2021-06-05 22:14:29,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:14:29,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:14:29,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:14:29,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:14:29,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:14:29,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:14:29,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:14:29,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:14:29,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:14:29,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... [2021-06-05 22:14:29,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:14:29,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:14:29,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:14:29,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:14:29,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:14:29,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:14:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:14:29,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:14:29,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:14:29,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:14:29,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:14:29,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:14:29,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:14:29,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:14:29,248 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:14:29,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:14:29,666 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 22:14:29,668 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:14:29 BoogieIcfgContainer [2021-06-05 22:14:29,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:14:29,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:14:29,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:14:29,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:14:29,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:14:29" (1/2) ... [2021-06-05 22:14:29,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738af564 and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:14:29, skipping insertion in model container [2021-06-05 22:14:29,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:14:29" (2/2) ... [2021-06-05 22:14:29,674 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2021-06-05 22:14:29,679 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:14:29,679 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:14:29,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:14:29,680 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:14:29,700 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 22:14:29,718 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:14:29,734 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:14:29,734 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:14:29,734 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:14:29,734 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:14:29,734 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:14:29,734 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:14:29,734 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:14:29,735 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:14:29,741 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-06-05 22:14:29,750 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:29,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 22:14:29,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:29,757 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:29,758 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash 942627414, now seen corresponding path program 1 times [2021-06-05 22:14:29,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:29,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038594441] [2021-06-05 22:14:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:29,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:29,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038594441] [2021-06-05 22:14:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038594441] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:14:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338977572] [2021-06-05 22:14:29,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:14:29,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:14:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:14:29,966 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,032 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-06-05 22:14:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:14:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 22:14:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,041 INFO L225 Difference]: With dead ends: 52 [2021-06-05 22:14:30,041 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 22:14:30,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 22:14:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-06-05 22:14:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-06-05 22:14:30,071 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-06-05 22:14:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,071 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-06-05 22:14:30,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-06-05 22:14:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 22:14:30,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,072 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:14:30,073 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 382081942, now seen corresponding path program 2 times [2021-06-05 22:14:30,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407832897] [2021-06-05 22:14:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407832897] [2021-06-05 22:14:30,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407832897] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:14:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169090194] [2021-06-05 22:14:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:14:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:14:30,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:14:30,180 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,231 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2021-06-05 22:14:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:14:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 22:14:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,233 INFO L225 Difference]: With dead ends: 48 [2021-06-05 22:14:30,233 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 22:14:30,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 22:14:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-06-05 22:14:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-06-05 22:14:30,238 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2021-06-05 22:14:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,239 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-06-05 22:14:30,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,239 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-06-05 22:14:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 22:14:30,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,240 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:14:30,240 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1385928133, now seen corresponding path program 1 times [2021-06-05 22:14:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179036170] [2021-06-05 22:14:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179036170] [2021-06-05 22:14:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179036170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:14:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621418150] [2021-06-05 22:14:30,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:14:30,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:14:30,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:14:30,264 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,271 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2021-06-05 22:14:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:14:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 22:14:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,273 INFO L225 Difference]: With dead ends: 28 [2021-06-05 22:14:30,273 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 22:14:30,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:14:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 22:14:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 22:14:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 22:14:30,278 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-05 22:14:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,278 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 22:14:30,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 22:14:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:30,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,279 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:14:30,279 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash 924188067, now seen corresponding path program 1 times [2021-06-05 22:14:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774972629] [2021-06-05 22:14:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774972629] [2021-06-05 22:14:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774972629] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:30,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980185521] [2021-06-05 22:14:30,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:30,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:30,373 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,432 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2021-06-05 22:14:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:30,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,437 INFO L225 Difference]: With dead ends: 60 [2021-06-05 22:14:30,437 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 22:14:30,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:30,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 22:14:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-06-05 22:14:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 22:14:30,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2021-06-05 22:14:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,448 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 22:14:30,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,448 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 22:14:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:30,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,449 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:14:30,449 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash -28486685, now seen corresponding path program 2 times [2021-06-05 22:14:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257598129] [2021-06-05 22:14:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257598129] [2021-06-05 22:14:30,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257598129] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:30,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394447323] [2021-06-05 22:14:30,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:30,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:30,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:30,555 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,625 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2021-06-05 22:14:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,627 INFO L225 Difference]: With dead ends: 75 [2021-06-05 22:14:30,627 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 22:14:30,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 22:14:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-06-05 22:14:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 22:14:30,642 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2021-06-05 22:14:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,643 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 22:14:30,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 22:14:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:30,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,644 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:14:30,644 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1663097951, now seen corresponding path program 3 times [2021-06-05 22:14:30,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607837327] [2021-06-05 22:14:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607837327] [2021-06-05 22:14:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607837327] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:30,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926919674] [2021-06-05 22:14:30,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:30,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:30,737 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,787 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-06-05 22:14:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,789 INFO L225 Difference]: With dead ends: 63 [2021-06-05 22:14:30,789 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 22:14:30,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 22:14:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-06-05 22:14:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-05 22:14:30,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2021-06-05 22:14:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,802 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-05 22:14:30,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-05 22:14:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:30,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,806 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 22:14:30,809 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1716368849, now seen corresponding path program 4 times [2021-06-05 22:14:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23366062] [2021-06-05 22:14:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:30,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:30,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23366062] [2021-06-05 22:14:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23366062] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:30,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:30,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:30,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176299231] [2021-06-05 22:14:30,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:30,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:30,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:30,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:30,889 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:30,951 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2021-06-05 22:14:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:30,953 INFO L225 Difference]: With dead ends: 81 [2021-06-05 22:14:30,953 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 22:14:30,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 22:14:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-06-05 22:14:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 22:14:30,963 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-05 22:14:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:30,964 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 22:14:30,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 22:14:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:30,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:30,969 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:30,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:14:30,969 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash -887013811, now seen corresponding path program 5 times [2021-06-05 22:14:30,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:30,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039247441] [2021-06-05 22:14:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039247441] [2021-06-05 22:14:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039247441] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:31,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:31,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400217625] [2021-06-05 22:14:31,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:31,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:31,107 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,160 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2021-06-05 22:14:31,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:31,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,161 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:14:31,161 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:14:31,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:14:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-06-05 22:14:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 22:14:31,175 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2021-06-05 22:14:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,175 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 22:14:31,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 22:14:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 22:14:31,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,175 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:14:31,176 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1520341375, now seen corresponding path program 6 times [2021-06-05 22:14:31,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650767457] [2021-06-05 22:14:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650767457] [2021-06-05 22:14:31,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650767457] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:31,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:31,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 22:14:31,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476784579] [2021-06-05 22:14:31,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:31,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:31,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:31,237 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,285 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2021-06-05 22:14:31,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:14:31,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 22:14:31,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,286 INFO L225 Difference]: With dead ends: 68 [2021-06-05 22:14:31,286 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 22:14:31,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 22:14:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-06-05 22:14:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2021-06-05 22:14:31,290 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2021-06-05 22:14:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,290 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2021-06-05 22:14:31,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2021-06-05 22:14:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:31,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,291 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:14:31,291 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2043306169, now seen corresponding path program 1 times [2021-06-05 22:14:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602602540] [2021-06-05 22:14:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602602540] [2021-06-05 22:14:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602602540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:31,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:31,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:31,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978918105] [2021-06-05 22:14:31,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:31,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:31,341 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,387 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-05 22:14:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:31,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:31,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,388 INFO L225 Difference]: With dead ends: 62 [2021-06-05 22:14:31,389 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 22:14:31,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 22:14:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-06-05 22:14:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 22:14:31,395 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 22:14:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,396 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 22:14:31,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 22:14:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:31,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,398 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 22:14:31,398 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1561333194, now seen corresponding path program 1 times [2021-06-05 22:14:31,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464744505] [2021-06-05 22:14:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464744505] [2021-06-05 22:14:31,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464744505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:31,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757358790] [2021-06-05 22:14:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:14:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757358790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:31,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:31,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 22:14:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051445079] [2021-06-05 22:14:31,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:14:31,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:14:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:14:31,602 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,644 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2021-06-05 22:14:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,645 INFO L225 Difference]: With dead ends: 58 [2021-06-05 22:14:31,645 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 22:14:31,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 22:14:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-06-05 22:14:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 22:14:31,648 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2021-06-05 22:14:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,648 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 22:14:31,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,648 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 22:14:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:31,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,649 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 22:14:31,871 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1719807367, now seen corresponding path program 2 times [2021-06-05 22:14:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604600395] [2021-06-05 22:14:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:31,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:31,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604600395] [2021-06-05 22:14:31,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604600395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:31,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:31,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933786975] [2021-06-05 22:14:31,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:31,910 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:31,956 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-06-05 22:14:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:31,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:31,957 INFO L225 Difference]: With dead ends: 79 [2021-06-05 22:14:31,957 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:14:31,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:14:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-06-05 22:14:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 22:14:31,961 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 22:14:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:31,961 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 22:14:31,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 22:14:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:31,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:31,962 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:31,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 22:14:31,962 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1972962632, now seen corresponding path program 2 times [2021-06-05 22:14:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089261951] [2021-06-05 22:14:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089261951] [2021-06-05 22:14:32,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089261951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140584439] [2021-06-05 22:14:32,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:14:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140584439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:32,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:14:32,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657871149] [2021-06-05 22:14:32,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:14:32,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:14:32,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:32,147 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,185 INFO L93 Difference]: Finished difference Result 69 states and 128 transitions. [2021-06-05 22:14:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,188 INFO L225 Difference]: With dead ends: 69 [2021-06-05 22:14:32,188 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 22:14:32,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 22:14:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-06-05 22:14:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 22:14:32,195 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 22:14:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,195 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 22:14:32,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 22:14:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:32,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,196 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 22:14:32,409 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1874666941, now seen corresponding path program 3 times [2021-06-05 22:14:32,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014743085] [2021-06-05 22:14:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014743085] [2021-06-05 22:14:32,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014743085] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:32,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:32,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172405079] [2021-06-05 22:14:32,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:32,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:32,446 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,497 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-06-05 22:14:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,499 INFO L225 Difference]: With dead ends: 64 [2021-06-05 22:14:32,499 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 22:14:32,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 22:14:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-06-05 22:14:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-06-05 22:14:32,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-06-05 22:14:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,502 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-06-05 22:14:32,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-06-05 22:14:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:32,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,503 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:14:32,503 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,503 INFO L82 PathProgramCache]: Analyzing trace with hash -108130304, now seen corresponding path program 3 times [2021-06-05 22:14:32,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007267103] [2021-06-05 22:14:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007267103] [2021-06-05 22:14:32,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007267103] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:32,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:32,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:32,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727340236] [2021-06-05 22:14:32,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:32,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:32,537 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,576 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2021-06-05 22:14:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,577 INFO L225 Difference]: With dead ends: 47 [2021-06-05 22:14:32,577 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 22:14:32,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 22:14:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-06-05 22:14:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 22:14:32,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-06-05 22:14:32,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,581 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 22:14:32,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 22:14:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:32,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:14:32,582 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash 831106635, now seen corresponding path program 4 times [2021-06-05 22:14:32,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552117667] [2021-06-05 22:14:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552117667] [2021-06-05 22:14:32,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552117667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:32,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:32,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:32,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824599492] [2021-06-05 22:14:32,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:32,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:32,631 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,671 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-06-05 22:14:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,672 INFO L225 Difference]: With dead ends: 62 [2021-06-05 22:14:32,673 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 22:14:32,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 22:14:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 22:14:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 22:14:32,676 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 22:14:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,676 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 22:14:32,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 22:14:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:32,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,677 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:32,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 22:14:32,677 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash 577951370, now seen corresponding path program 4 times [2021-06-05 22:14:32,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:32,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835689775] [2021-06-05 22:14:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835689775] [2021-06-05 22:14:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835689775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647132705] [2021-06-05 22:14:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:32,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:14:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:32,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647132705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:32,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:32,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:14:32,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820713774] [2021-06-05 22:14:32,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:14:32,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:14:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:32,826 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:32,864 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-06-05 22:14:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:32,865 INFO L225 Difference]: With dead ends: 63 [2021-06-05 22:14:32,865 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 22:14:32,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:14:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 22:14:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-05 22:14:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 22:14:32,867 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 22:14:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:32,867 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 22:14:32,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 22:14:32,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:32,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:32,868 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:14:33,087 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,087 INFO L82 PathProgramCache]: Analyzing trace with hash 130613647, now seen corresponding path program 5 times [2021-06-05 22:14:33,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39308136] [2021-06-05 22:14:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39308136] [2021-06-05 22:14:33,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39308136] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:33,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:33,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617164957] [2021-06-05 22:14:33,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:33,121 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,164 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-06-05 22:14:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,165 INFO L225 Difference]: With dead ends: 62 [2021-06-05 22:14:33,165 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 22:14:33,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 22:14:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-06-05 22:14:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 22:14:33,168 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 22:14:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,168 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 22:14:33,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 22:14:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:33,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,169 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 22:14:33,169 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1852183598, now seen corresponding path program 5 times [2021-06-05 22:14:33,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056716198] [2021-06-05 22:14:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056716198] [2021-06-05 22:14:33,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056716198] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:33,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:33,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:33,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191385132] [2021-06-05 22:14:33,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:33,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:33,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:33,202 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,243 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-06-05 22:14:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,244 INFO L225 Difference]: With dead ends: 65 [2021-06-05 22:14:33,244 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 22:14:33,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 22:14:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 22:14:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 22:14:33,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-06-05 22:14:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,247 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 22:14:33,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 22:14:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:33,247 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,247 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 22:14:33,247 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,248 INFO L82 PathProgramCache]: Analyzing trace with hash 133239423, now seen corresponding path program 6 times [2021-06-05 22:14:33,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378496096] [2021-06-05 22:14:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378496096] [2021-06-05 22:14:33,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378496096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:33,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:33,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342864168] [2021-06-05 22:14:33,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:33,272 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,311 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 22:14:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,311 INFO L225 Difference]: With dead ends: 60 [2021-06-05 22:14:33,311 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 22:14:33,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 22:14:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-06-05 22:14:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 22:14:33,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 22:14:33,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,313 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 22:14:33,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 22:14:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 22:14:33,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,314 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 22:14:33,314 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,315 INFO L82 PathProgramCache]: Analyzing trace with hash -238616864, now seen corresponding path program 6 times [2021-06-05 22:14:33,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482437310] [2021-06-05 22:14:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482437310] [2021-06-05 22:14:33,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482437310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:14:33,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:14:33,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:14:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651772105] [2021-06-05 22:14:33,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:14:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:14:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:14:33,341 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:33,387 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-06-05 22:14:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:14:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 22:14:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:33,388 INFO L225 Difference]: With dead ends: 43 [2021-06-05 22:14:33,388 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 22:14:33,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:14:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 22:14:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 22:14:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 22:14:33,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 22:14:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:33,393 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 22:14:33,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 22:14:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:33,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:33,395 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 22:14:33,395 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 319968626, now seen corresponding path program 1 times [2021-06-05 22:14:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:33,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424781557] [2021-06-05 22:14:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:33,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424781557] [2021-06-05 22:14:33,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424781557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:33,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918404365] [2021-06-05 22:14:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:33,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:33,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918404365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:33,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:33,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:14:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585189276] [2021-06-05 22:14:33,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:14:33,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:14:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:33,953 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,270 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 22:14:34,398 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 22:14:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:34,408 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-06-05 22:14:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:34,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:34,409 INFO L225 Difference]: With dead ends: 78 [2021-06-05 22:14:34,409 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 22:14:34,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:34,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 22:14:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-06-05 22:14:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-06-05 22:14:34,412 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-06-05 22:14:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:34,412 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-06-05 22:14:34,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-06-05 22:14:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:34,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:34,412 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:34,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,629 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 851822386, now seen corresponding path program 2 times [2021-06-05 22:14:34,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:34,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965100220] [2021-06-05 22:14:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:34,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965100220] [2021-06-05 22:14:34,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965100220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792024321] [2021-06-05 22:14:34,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:34,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:34,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:35,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792024321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:35,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:14:35,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736184982] [2021-06-05 22:14:35,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:14:35,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:35,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:14:35,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:14:35,069 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:35,348 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 22:14:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:35,349 INFO L225 Difference]: With dead ends: 82 [2021-06-05 22:14:35,349 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 22:14:35,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 22:14:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-06-05 22:14:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2021-06-05 22:14:35,351 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 14 [2021-06-05 22:14:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:35,351 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2021-06-05 22:14:35,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2021-06-05 22:14:35,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:35,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:35,352 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:35,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:14:35,575 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:35,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:35,578 INFO L82 PathProgramCache]: Analyzing trace with hash 151329398, now seen corresponding path program 3 times [2021-06-05 22:14:35,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:35,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101484176] [2021-06-05 22:14:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:35,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:35,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101484176] [2021-06-05 22:14:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101484176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327613505] [2021-06-05 22:14:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:35,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:35,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:35,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:35,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327613505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:35,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:35,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:14:35,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805978578] [2021-06-05 22:14:35,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:14:35,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:14:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:35,926 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:36,268 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2021-06-05 22:14:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:14:36,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:36,269 INFO L225 Difference]: With dead ends: 95 [2021-06-05 22:14:36,269 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 22:14:36,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 22:14:36,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-06-05 22:14:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 22:14:36,271 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 22:14:36,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:36,272 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 22:14:36,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 22:14:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:36,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:36,272 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:36,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:14:36,479 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:36,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1842914034, now seen corresponding path program 4 times [2021-06-05 22:14:36,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:36,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779337122] [2021-06-05 22:14:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:36,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779337122] [2021-06-05 22:14:36,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779337122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203149349] [2021-06-05 22:14:36,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:36,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203149349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:36,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:36,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 22:14:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407101468] [2021-06-05 22:14:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:14:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:14:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:14:36,849 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:37,156 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-06-05 22:14:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:14:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:37,157 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:14:37,157 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:14:37,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:14:37,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2021-06-05 22:14:37,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 22:14:37,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 22:14:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:37,159 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 22:14:37,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 22:14:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:37,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:37,160 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:37,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:14:37,373 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1869019580, now seen corresponding path program 5 times [2021-06-05 22:14:37,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:37,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84736776] [2021-06-05 22:14:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84736776] [2021-06-05 22:14:37,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84736776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869813295] [2021-06-05 22:14:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:37,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:37,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:37,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869813295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:37,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:37,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525308797] [2021-06-05 22:14:37,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:37,836 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:38,123 INFO L93 Difference]: Finished difference Result 68 states and 129 transitions. [2021-06-05 22:14:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:38,124 INFO L225 Difference]: With dead ends: 68 [2021-06-05 22:14:38,124 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 22:14:38,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:38,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 22:14:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-06-05 22:14:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 22:14:38,127 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 22:14:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:38,127 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 22:14:38,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 22:14:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:38,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:38,128 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:38,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:14:38,351 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1725454728, now seen corresponding path program 6 times [2021-06-05 22:14:38,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:38,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433064922] [2021-06-05 22:14:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:38,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:38,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433064922] [2021-06-05 22:14:38,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433064922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:38,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367328276] [2021-06-05 22:14:38,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:38,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:38,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:38,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:38,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367328276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:38,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149479721] [2021-06-05 22:14:38,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:38,983 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:39,179 INFO L93 Difference]: Finished difference Result 83 states and 153 transitions. [2021-06-05 22:14:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:39,181 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:14:39,181 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:14:39,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:14:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-06-05 22:14:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 22:14:39,186 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 22:14:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:39,186 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 22:14:39,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 22:14:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:39,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:39,187 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:39,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:39,409 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash -877927932, now seen corresponding path program 7 times [2021-06-05 22:14:39,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:39,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387795622] [2021-06-05 22:14:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:39,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:39,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387795622] [2021-06-05 22:14:39,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387795622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:39,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548971298] [2021-06-05 22:14:39,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:40,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548971298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:40,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:40,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15823986] [2021-06-05 22:14:40,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:40,020 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:40,355 INFO L93 Difference]: Finished difference Result 71 states and 135 transitions. [2021-06-05 22:14:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:40,356 INFO L225 Difference]: With dead ends: 71 [2021-06-05 22:14:40,356 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 22:14:40,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 22:14:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-06-05 22:14:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 22:14:40,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2021-06-05 22:14:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:40,358 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 22:14:40,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 22:14:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:40,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:40,359 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:40,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 22:14:40,563 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:40,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:40,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1190224926, now seen corresponding path program 8 times [2021-06-05 22:14:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:40,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422513578] [2021-06-05 22:14:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:40,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422513578] [2021-06-05 22:14:40,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422513578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:40,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883862045] [2021-06-05 22:14:40,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:40,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:41,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883862045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:41,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:41,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:41,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754157606] [2021-06-05 22:14:41,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:41,343 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,500 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-06-05 22:14:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:41,615 INFO L93 Difference]: Finished difference Result 79 states and 146 transitions. [2021-06-05 22:14:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:41,618 INFO L225 Difference]: With dead ends: 79 [2021-06-05 22:14:41,618 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 22:14:41,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 22:14:41,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-06-05 22:14:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 22:14:41,620 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 22:14:41,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:41,620 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 22:14:41,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 22:14:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:41,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:41,621 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:41,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 22:14:41,825 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1413157734, now seen corresponding path program 9 times [2021-06-05 22:14:41,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:41,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173723870] [2021-06-05 22:14:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:42,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173723870] [2021-06-05 22:14:42,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173723870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:42,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809812700] [2021-06-05 22:14:42,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:42,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:42,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:42,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:42,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809812700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:42,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:42,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:42,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514487144] [2021-06-05 22:14:42,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:42,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:42,765 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:42,945 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-06-05 22:14:43,073 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 22:14:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:43,086 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2021-06-05 22:14:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:43,087 INFO L225 Difference]: With dead ends: 81 [2021-06-05 22:14:43,087 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 22:14:43,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 22:14:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-06-05 22:14:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 22:14:43,089 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 22:14:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:43,090 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 22:14:43,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 22:14:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:43,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:43,090 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:43,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 22:14:43,312 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1239910042, now seen corresponding path program 10 times [2021-06-05 22:14:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:43,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126337278] [2021-06-05 22:14:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:43,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:43,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126337278] [2021-06-05 22:14:43,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126337278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:43,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130702852] [2021-06-05 22:14:43,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:43,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:43,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130702852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:43,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:43,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:43,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157593881] [2021-06-05 22:14:43,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:43,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:43,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:43,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:43,925 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:44,097 INFO L93 Difference]: Finished difference Result 66 states and 124 transitions. [2021-06-05 22:14:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:44,098 INFO L225 Difference]: With dead ends: 66 [2021-06-05 22:14:44,098 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 22:14:44,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 22:14:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-06-05 22:14:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 22:14:44,100 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 22:14:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:44,101 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 22:14:44,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 22:14:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:44,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:44,101 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:44,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 22:14:44,309 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash -100096846, now seen corresponding path program 11 times [2021-06-05 22:14:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884677202] [2021-06-05 22:14:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:44,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884677202] [2021-06-05 22:14:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884677202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:44,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851761983] [2021-06-05 22:14:44,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:44,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:44,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:44,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851761983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:44,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:44,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:44,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743790655] [2021-06-05 22:14:44,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:44,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:44,737 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:45,016 INFO L93 Difference]: Finished difference Result 72 states and 137 transitions. [2021-06-05 22:14:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:45,017 INFO L225 Difference]: With dead ends: 72 [2021-06-05 22:14:45,017 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 22:14:45,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 22:14:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-06-05 22:14:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 22:14:45,019 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 22:14:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:45,019 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 22:14:45,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 22:14:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:45,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:45,020 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,225 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -800589834, now seen corresponding path program 12 times [2021-06-05 22:14:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297979427] [2021-06-05 22:14:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:45,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297979427] [2021-06-05 22:14:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297979427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239636495] [2021-06-05 22:14:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:45,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:45,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:45,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239636495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:45,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:45,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714318894] [2021-06-05 22:14:45,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:45,936 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:46,140 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2021-06-05 22:14:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:46,141 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:14:46,141 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:14:46,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:14:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-06-05 22:14:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 22:14:46,145 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 22:14:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:46,146 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 22:14:46,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 22:14:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:46,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:46,146 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:46,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 22:14:46,353 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:46,353 INFO L82 PathProgramCache]: Analyzing trace with hash 890994802, now seen corresponding path program 13 times [2021-06-05 22:14:46,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:46,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169788084] [2021-06-05 22:14:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:46,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:46,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169788084] [2021-06-05 22:14:46,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169788084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:46,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583233306] [2021-06-05 22:14:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:46,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:46,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583233306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:46,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:46,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:46,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779753105] [2021-06-05 22:14:46,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:46,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:46,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:46,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:46,933 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,080 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 22:14:47,253 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-05 22:14:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:47,344 INFO L93 Difference]: Finished difference Result 75 states and 143 transitions. [2021-06-05 22:14:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:47,345 INFO L225 Difference]: With dead ends: 75 [2021-06-05 22:14:47,345 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 22:14:47,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 22:14:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2021-06-05 22:14:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 22:14:47,347 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 22:14:47,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:47,347 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 22:14:47,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 22:14:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:47,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:47,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:47,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:47,553 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:47,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1335819636, now seen corresponding path program 14 times [2021-06-05 22:14:47,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:47,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735967057] [2021-06-05 22:14:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:47,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735967057] [2021-06-05 22:14:47,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735967057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275401661] [2021-06-05 22:14:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:47,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:47,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275401661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:48,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:48,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372657892] [2021-06-05 22:14:48,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:48,128 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:48,377 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 22:14:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:48,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:48,378 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:14:48,378 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:14:48,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 498.5ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:14:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-06-05 22:14:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 22:14:48,380 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 22:14:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:48,380 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 22:14:48,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 22:14:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:48,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:48,381 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:48,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:48,589 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 355765000, now seen corresponding path program 15 times [2021-06-05 22:14:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:48,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642302845] [2021-06-05 22:14:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:48,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:48,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642302845] [2021-06-05 22:14:48,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642302845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:48,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593224495] [2021-06-05 22:14:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:48,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:48,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:48,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593224495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:49,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:49,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 22:14:49,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558834955] [2021-06-05 22:14:49,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:49,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:49,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:49,169 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,362 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-06-05 22:14:49,501 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 22:14:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:49,511 INFO L93 Difference]: Finished difference Result 85 states and 156 transitions. [2021-06-05 22:14:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:49,512 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:14:49,512 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 22:14:49,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 22:14:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-06-05 22:14:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 22:14:49,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 22:14:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:49,521 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 22:14:49,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 22:14:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:49,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:49,521 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:49,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:49,737 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash 529012692, now seen corresponding path program 16 times [2021-06-05 22:14:49,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:49,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738818479] [2021-06-05 22:14:49,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:49,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738818479] [2021-06-05 22:14:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738818479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664393679] [2021-06-05 22:14:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:49,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:50,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664393679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:50,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:50,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493203278] [2021-06-05 22:14:50,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:50,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:50,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:50,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:50,250 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,430 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 22:14:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:50,481 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2021-06-05 22:14:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:50,482 INFO L225 Difference]: With dead ends: 70 [2021-06-05 22:14:50,482 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 22:14:50,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 22:14:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-06-05 22:14:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-05 22:14:50,484 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2021-06-05 22:14:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:50,484 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-05 22:14:50,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-05 22:14:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:50,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:50,484 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:50,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:50,689 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:50,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1254420580, now seen corresponding path program 17 times [2021-06-05 22:14:50,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:50,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991721725] [2021-06-05 22:14:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:50,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991721725] [2021-06-05 22:14:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991721725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:50,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290405902] [2021-06-05 22:14:50,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:50,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:14:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:51,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290405902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:51,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:51,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:14:51,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793298301] [2021-06-05 22:14:51,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:14:51,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:14:51,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:14:51,037 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:51,436 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-06-05 22:14:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:14:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:51,437 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:14:51,437 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 22:14:51,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:14:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 22:14:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2021-06-05 22:14:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2021-06-05 22:14:51,439 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 14 [2021-06-05 22:14:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:51,439 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2021-06-05 22:14:51,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2021-06-05 22:14:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:51,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:51,439 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:51,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 22:14:51,640 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 437164056, now seen corresponding path program 18 times [2021-06-05 22:14:51,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:51,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196993104] [2021-06-05 22:14:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:51,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196993104] [2021-06-05 22:14:51,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196993104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:51,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051169908] [2021-06-05 22:14:51,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:51,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:51,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:51,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:51,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:52,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051169908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:52,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:52,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:14:52,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113862966] [2021-06-05 22:14:52,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:52,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:52,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:52,188 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:52,520 INFO L93 Difference]: Finished difference Result 105 states and 192 transitions. [2021-06-05 22:14:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:14:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:52,521 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:14:52,521 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 22:14:52,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:52,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 22:14:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2021-06-05 22:14:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2021-06-05 22:14:52,523 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 14 [2021-06-05 22:14:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:52,523 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2021-06-05 22:14:52,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2021-06-05 22:14:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:52,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:52,523 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:52,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:52,729 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash 610411748, now seen corresponding path program 19 times [2021-06-05 22:14:52,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:52,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340589057] [2021-06-05 22:14:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:53,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:53,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340589057] [2021-06-05 22:14:53,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340589057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722040728] [2021-06-05 22:14:53,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:53,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:53,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722040728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:53,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:53,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 22:14:53,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505584064] [2021-06-05 22:14:53,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:14:53,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:14:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:53,413 INFO L87 Difference]: Start difference. First operand 56 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,676 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 22:14:53,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:53,850 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-06-05 22:14:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:53,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:53,851 INFO L225 Difference]: With dead ends: 91 [2021-06-05 22:14:53,851 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:14:53,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:14:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-06-05 22:14:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 22:14:53,853 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 14 [2021-06-05 22:14:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:53,853 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 22:14:53,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 22:14:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:14:53,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:53,853 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:54,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:54,064 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2070988814, now seen corresponding path program 20 times [2021-06-05 22:14:54,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:54,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735821972] [2021-06-05 22:14:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:54,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735821972] [2021-06-05 22:14:54,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735821972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:54,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668234524] [2021-06-05 22:14:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:14:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668234524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:54,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:54,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 22:14:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293232440] [2021-06-05 22:14:54,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:14:54,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:14:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:14:54,565 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,014 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 22:14:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:55,028 INFO L93 Difference]: Finished difference Result 88 states and 163 transitions. [2021-06-05 22:14:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:14:55,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:14:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:55,031 INFO L225 Difference]: With dead ends: 88 [2021-06-05 22:14:55,032 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:14:55,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 732.2ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:14:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:14:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-06-05 22:14:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 22:14:55,034 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 14 [2021-06-05 22:14:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:55,034 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 22:14:55,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 22:14:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:55,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:55,034 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:55,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 22:14:55,235 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:55,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:55,235 INFO L82 PathProgramCache]: Analyzing trace with hash 492372682, now seen corresponding path program 21 times [2021-06-05 22:14:55,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:55,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988503409] [2021-06-05 22:14:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:55,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:55,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988503409] [2021-06-05 22:14:55,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988503409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404324991] [2021-06-05 22:14:55,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:55,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:14:55,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:55,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:55,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404324991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:55,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:14:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921758734] [2021-06-05 22:14:55,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:14:55,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:14:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:14:55,448 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:55,653 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 22:14:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:55,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:55,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:55,654 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:14:55,654 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 22:14:55,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:55,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 22:14:55,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-06-05 22:14:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 22:14:55,656 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 15 [2021-06-05 22:14:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:55,656 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 22:14:55,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 22:14:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:55,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:55,657 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:55,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:55,879 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1563887655, now seen corresponding path program 22 times [2021-06-05 22:14:55,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:55,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688832600] [2021-06-05 22:14:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:55,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688832600] [2021-06-05 22:14:55,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688832600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468785982] [2021-06-05 22:14:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:55,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:14:55,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468785982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:56,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:56,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:14:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109657436] [2021-06-05 22:14:56,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:14:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:14:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:14:56,072 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:56,232 INFO L93 Difference]: Finished difference Result 80 states and 153 transitions. [2021-06-05 22:14:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:14:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:56,233 INFO L225 Difference]: With dead ends: 80 [2021-06-05 22:14:56,233 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:14:56,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:14:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2021-06-05 22:14:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 22:14:56,234 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 15 [2021-06-05 22:14:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:56,235 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 22:14:56,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 22:14:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:56,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:56,235 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:56,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 22:14:56,437 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash -200029942, now seen corresponding path program 23 times [2021-06-05 22:14:56,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:56,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562629867] [2021-06-05 22:14:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562629867] [2021-06-05 22:14:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562629867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953205573] [2021-06-05 22:14:56,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:56,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:56,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:56,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953205573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:56,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:56,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:14:56,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138731962] [2021-06-05 22:14:56,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:14:56,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:56,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:14:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:14:56,635 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:56,817 INFO L93 Difference]: Finished difference Result 84 states and 157 transitions. [2021-06-05 22:14:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:14:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:56,818 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:14:56,818 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 22:14:56,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:14:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 22:14:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-06-05 22:14:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 22:14:56,821 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 22:14:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:56,822 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 22:14:56,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 22:14:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:56,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:56,822 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:57,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 22:14:57,033 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 542091435, now seen corresponding path program 24 times [2021-06-05 22:14:57,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:57,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164333730] [2021-06-05 22:14:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:57,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:57,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164333730] [2021-06-05 22:14:57,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164333730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283421986] [2021-06-05 22:14:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:57,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:14:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:57,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:57,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:14:57,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:57,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:57,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:14:57,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:57,327 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:14:57,327 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:14:57,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:14:57,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:14:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:57,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283421986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:57,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:14:57,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765148833] [2021-06-05 22:14:57,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:57,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:57,349 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:57,497 INFO L93 Difference]: Finished difference Result 75 states and 147 transitions. [2021-06-05 22:14:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:14:57,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:57,498 INFO L225 Difference]: With dead ends: 75 [2021-06-05 22:14:57,498 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 22:14:57,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:14:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 22:14:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 22:14:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 22:14:57,500 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 22:14:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:57,500 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 22:14:57,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 22:14:57,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:57,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:57,500 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:57,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 22:14:57,701 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -440476090, now seen corresponding path program 25 times [2021-06-05 22:14:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702666662] [2021-06-05 22:14:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:57,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702666662] [2021-06-05 22:14:57,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702666662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:57,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547865908] [2021-06-05 22:14:57,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:57,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:57,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:14:57,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:14:57,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:58,036 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:14:58,036 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:14:58,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:14:58,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:58,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:58,054 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 22:14:58,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:58,055 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:14:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547865908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:58,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:58,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:14:58,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294944917] [2021-06-05 22:14:58,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:58,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:58,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:58,115 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:58,697 INFO L93 Difference]: Finished difference Result 105 states and 194 transitions. [2021-06-05 22:14:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:14:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:58,698 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:14:58,698 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:14:58,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:14:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:14:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-06-05 22:14:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 22:14:58,701 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 22:14:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:58,701 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 22:14:58,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 22:14:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:58,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:58,701 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:58,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:58,913 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -693631355, now seen corresponding path program 26 times [2021-06-05 22:14:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069266301] [2021-06-05 22:14:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:58,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:58,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069266301] [2021-06-05 22:14:58,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069266301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:58,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146528675] [2021-06-05 22:14:58,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:58,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:14:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:59,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:14:59,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:14:59,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,147 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:14:59,147 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:14:59,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:59,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:14:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:59,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146528675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:59,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:14:59,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:14:59,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39192538] [2021-06-05 22:14:59,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:14:59,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:14:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:14:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:14:59,195 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:14:59,430 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 22:14:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:14:59,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:14:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:14:59,431 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:14:59,431 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 22:14:59,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:14:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 22:14:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2021-06-05 22:14:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 22:14:59,433 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 22:14:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:14:59,433 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 22:14:59,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:14:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 22:14:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:14:59,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:14:59,433 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:14:59,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:59,634 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:14:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:14:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1140969078, now seen corresponding path program 27 times [2021-06-05 22:14:59,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:14:59,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876918540] [2021-06-05 22:14:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:14:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:14:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:14:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:14:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876918540] [2021-06-05 22:14:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876918540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:14:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403922048] [2021-06-05 22:14:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:14:59,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:14:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:14:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:14:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:14:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:14:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:14:59,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:14:59,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,957 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:14:59,958 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:14:59,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:14:59,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:14:59,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:14:59,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 22:14:59,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:14:59,977 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403922048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:00,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13235795] [2021-06-05 22:15:00,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:00,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:00,036 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:00,287 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2021-06-05 22:15:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:00,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:00,297 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:15:00,297 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:15:00,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:15:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 55. [2021-06-05 22:15:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-06-05 22:15:00,300 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 15 [2021-06-05 22:15:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:00,300 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-06-05 22:15:00,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-06-05 22:15:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:00,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:00,300 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:00,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:00,523 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1171200973, now seen corresponding path program 28 times [2021-06-05 22:15:00,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:00,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953151797] [2021-06-05 22:15:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:00,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953151797] [2021-06-05 22:15:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953151797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760454448] [2021-06-05 22:15:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:00,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:00,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:00,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:00,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:00,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:00,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:00,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:00,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:00,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:00,774 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:15:00,774 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:00,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:00,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:15:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:00,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760454448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:00,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:00,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:00,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132147803] [2021-06-05 22:15:00,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:00,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:00,836 INFO L87 Difference]: Start difference. First operand 55 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:01,077 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-06-05 22:15:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:01,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:01,082 INFO L225 Difference]: With dead ends: 72 [2021-06-05 22:15:01,082 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 22:15:01,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 22:15:01,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2021-06-05 22:15:01,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 22:15:01,084 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 15 [2021-06-05 22:15:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:01,084 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 22:15:01,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 22:15:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:01,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:01,085 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 22:15:01,297 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1353215032, now seen corresponding path program 29 times [2021-06-05 22:15:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732938112] [2021-06-05 22:15:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:01,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732938112] [2021-06-05 22:15:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732938112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841415365] [2021-06-05 22:15:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:01,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:01,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:01,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841415365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:01,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:01,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:15:01,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465965154] [2021-06-05 22:15:01,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:15:01,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:01,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:15:01,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:01,482 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:01,692 INFO L93 Difference]: Finished difference Result 69 states and 133 transitions. [2021-06-05 22:15:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:01,693 INFO L225 Difference]: With dead ends: 69 [2021-06-05 22:15:01,694 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 22:15:01,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 22:15:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-06-05 22:15:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 22:15:01,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 22:15:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:01,696 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 22:15:01,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 22:15:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:01,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:01,696 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:01,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-06-05 22:15:01,909 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2095336409, now seen corresponding path program 30 times [2021-06-05 22:15:01,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:01,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459418056] [2021-06-05 22:15:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:01,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:01,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459418056] [2021-06-05 22:15:01,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459418056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:01,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897814975] [2021-06-05 22:15:01,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:01,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:15:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:01,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:02,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:02,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:02,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:02,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,125 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:15:02,125 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:02,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:15:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:02,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897814975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:02,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:02,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:02,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287946692] [2021-06-05 22:15:02,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:02,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:02,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:02,144 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:02,266 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-06-05 22:15:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:02,267 INFO L225 Difference]: With dead ends: 68 [2021-06-05 22:15:02,267 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 22:15:02,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 22:15:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-06-05 22:15:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 22:15:02,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 22:15:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:02,269 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 22:15:02,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 22:15:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:02,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:02,270 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:02,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 22:15:02,477 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:02,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1112768884, now seen corresponding path program 31 times [2021-06-05 22:15:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:02,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164464833] [2021-06-05 22:15:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:02,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:02,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164464833] [2021-06-05 22:15:02,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164464833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:02,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638676533] [2021-06-05 22:15:02,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:02,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:02,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:02,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:02,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:02,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:02,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,862 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:15:02,863 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:02,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:02,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:02,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-06-05 22:15:02,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:02,886 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638676533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:02,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:02,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:02,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439909627] [2021-06-05 22:15:02,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:02,949 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:03,275 INFO L93 Difference]: Finished difference Result 87 states and 164 transitions. [2021-06-05 22:15:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:15:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:03,288 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:15:03,288 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:15:03,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:15:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-06-05 22:15:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 22:15:03,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 22:15:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:03,290 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 22:15:03,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 22:15:03,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:03,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:03,291 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:03,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 22:15:03,492 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:03,492 INFO L82 PathProgramCache]: Analyzing trace with hash 859613619, now seen corresponding path program 32 times [2021-06-05 22:15:03,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:03,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252442264] [2021-06-05 22:15:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:03,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:03,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252442264] [2021-06-05 22:15:03,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252442264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623896388] [2021-06-05 22:15:03,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:03,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:03,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:03,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:03,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:03,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:03,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:03,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:03,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:03,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:03,713 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:15:03,713 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:03,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:03,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:15:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:03,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623896388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:03,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:03,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:03,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122368195] [2021-06-05 22:15:03,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:03,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:03,760 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:03,920 INFO L93 Difference]: Finished difference Result 94 states and 181 transitions. [2021-06-05 22:15:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:03,925 INFO L225 Difference]: With dead ends: 94 [2021-06-05 22:15:03,925 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:15:03,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:15:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-06-05 22:15:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 22:15:03,927 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 22:15:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:03,927 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 22:15:03,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 22:15:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:03,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:03,928 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:04,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:04,151 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:04,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:04,151 INFO L82 PathProgramCache]: Analyzing trace with hash 412275896, now seen corresponding path program 33 times [2021-06-05 22:15:04,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:04,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853685737] [2021-06-05 22:15:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853685737] [2021-06-05 22:15:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853685737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147084877] [2021-06-05 22:15:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:04,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:04,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:04,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:04,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:04,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:04,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:04,391 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:15:04,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:04,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:04,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:04,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:04,415 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-06-05 22:15:04,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:04,416 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:04,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:04,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147084877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:04,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:04,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:04,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877909614] [2021-06-05 22:15:04,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:04,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:04,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:04,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:04,463 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:04,645 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2021-06-05 22:15:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:15:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:04,645 INFO L225 Difference]: With dead ends: 72 [2021-06-05 22:15:04,645 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 22:15:04,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 22:15:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2021-06-05 22:15:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 22:15:04,647 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 22:15:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:04,647 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 22:15:04,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 22:15:04,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:04,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:04,647 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:04,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 22:15:04,857 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1570521349, now seen corresponding path program 34 times [2021-06-05 22:15:04,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:04,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638538035] [2021-06-05 22:15:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:04,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:04,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638538035] [2021-06-05 22:15:04,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638538035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:04,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38418497] [2021-06-05 22:15:04,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:04,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:04,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:05,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:05,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:05,118 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 22:15:05,118 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:05,119 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-06-05 22:15:05,119 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-06-05 22:15:05,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:05,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:05,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38418497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:05,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:05,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:05,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705645549] [2021-06-05 22:15:05,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:05,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:05,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:05,188 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:05,325 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-06-05 22:15:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:05,325 INFO L225 Difference]: With dead ends: 71 [2021-06-05 22:15:05,325 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 22:15:05,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 22:15:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-06-05 22:15:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 22:15:05,327 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 22:15:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:05,327 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 22:15:05,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 22:15:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:05,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:05,327 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:05,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:05,528 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1700514206, now seen corresponding path program 35 times [2021-06-05 22:15:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:05,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817029384] [2021-06-05 22:15:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:05,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817029384] [2021-06-05 22:15:05,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817029384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:05,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742597298] [2021-06-05 22:15:05,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:05,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:05,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742597298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:05,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:05,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:15:05,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349777493] [2021-06-05 22:15:05,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:15:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:15:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:05,828 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:06,033 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-06-05 22:15:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:06,034 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:06,034 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 22:15:06,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 22:15:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-05 22:15:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 22:15:06,036 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 22:15:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:06,036 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 22:15:06,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,036 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 22:15:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:06,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:06,036 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:06,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:06,245 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:06,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:06,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1447358941, now seen corresponding path program 36 times [2021-06-05 22:15:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:06,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299327797] [2021-06-05 22:15:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:06,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299327797] [2021-06-05 22:15:06,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299327797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:06,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518640140] [2021-06-05 22:15:06,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:06,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:06,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:06,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:06,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:06,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:06,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:06,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:06,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:06,498 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:15:06,498 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:06,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:06,500 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:06,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518640140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:06,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286569678] [2021-06-05 22:15:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:06,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:06,542 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:06,661 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 22:15:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:06,661 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:15:06,662 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:15:06,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:15:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-06-05 22:15:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 22:15:06,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 22:15:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:06,664 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 22:15:06,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 22:15:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:06,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:06,664 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:06,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:06,881 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:06,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:06,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1000021218, now seen corresponding path program 37 times [2021-06-05 22:15:06,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:06,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234710612] [2021-06-05 22:15:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234710612] [2021-06-05 22:15:06,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234710612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426638559] [2021-06-05 22:15:06,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:07,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:07,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:07,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:07,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:07,113 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,146 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:15:07,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:07,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:07,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:15:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:07,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426638559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:07,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:07,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738153058] [2021-06-05 22:15:07,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:07,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:07,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:07,184 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:07,294 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-05 22:15:07,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:07,295 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:07,295 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:15:07,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:15:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2021-06-05 22:15:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 22:15:07,297 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 22:15:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:07,297 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 22:15:07,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 22:15:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:07,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:07,297 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:07,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:07,498 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash -982776027, now seen corresponding path program 38 times [2021-06-05 22:15:07,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:07,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290060053] [2021-06-05 22:15:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:07,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:07,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290060053] [2021-06-05 22:15:07,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290060053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34252747] [2021-06-05 22:15:07,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:07,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:07,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:07,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:07,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:07,741 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:15:07,741 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:07,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:07,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:07,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34252747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:07,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:07,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662641232] [2021-06-05 22:15:07,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:07,818 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:08,065 INFO L93 Difference]: Finished difference Result 92 states and 175 transitions. [2021-06-05 22:15:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:08,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:08,066 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:15:08,066 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:15:08,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:15:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-06-05 22:15:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2021-06-05 22:15:08,068 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2021-06-05 22:15:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:08,068 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2021-06-05 22:15:08,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2021-06-05 22:15:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:08,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:08,068 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:08,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-05 22:15:08,285 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 464791416, now seen corresponding path program 39 times [2021-06-05 22:15:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:08,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127428333] [2021-06-05 22:15:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:08,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:08,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127428333] [2021-06-05 22:15:08,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127428333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:08,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278653107] [2021-06-05 22:15:08,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:08,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:08,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:08,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:08,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:08,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:08,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:08,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:08,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:08,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:08,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:08,466 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:15:08,466 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:08,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:15:08,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:15:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278653107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:08,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:08,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:08,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368840009] [2021-06-05 22:15:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:08,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:08,487 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:08,569 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-06-05 22:15:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:08,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:08,570 INFO L225 Difference]: With dead ends: 71 [2021-06-05 22:15:08,570 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 22:15:08,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:08,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 22:15:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-06-05 22:15:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 22:15:08,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 15 [2021-06-05 22:15:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:08,572 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 22:15:08,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 22:15:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:08,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:08,573 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:08,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:08,785 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 92935129, now seen corresponding path program 40 times [2021-06-05 22:15:08,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:08,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042336414] [2021-06-05 22:15:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:08,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:08,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042336414] [2021-06-05 22:15:08,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042336414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:08,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105320505] [2021-06-05 22:15:08,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:08,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:08,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:09,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:09,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:09,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:09,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,062 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:15:09,062 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:09,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:09,063 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:15:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:09,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105320505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:09,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:09,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:09,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172389682] [2021-06-05 22:15:09,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:09,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:09,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:09,093 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:09,169 INFO L93 Difference]: Finished difference Result 66 states and 129 transitions. [2021-06-05 22:15:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:15:09,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:09,170 INFO L225 Difference]: With dead ends: 66 [2021-06-05 22:15:09,170 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 22:15:09,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 22:15:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-06-05 22:15:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 22:15:09,171 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 22:15:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:09,172 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 22:15:09,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 22:15:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:09,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:09,172 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:09,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:09,373 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash 355244938, now seen corresponding path program 41 times [2021-06-05 22:15:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:09,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530584515] [2021-06-05 22:15:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:09,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:09,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530584515] [2021-06-05 22:15:09,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530584515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:09,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388004818] [2021-06-05 22:15:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:09,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:09,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:09,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:09,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:09,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:09,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:09,633 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:15:09,633 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:09,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:09,634 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:15:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:09,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388004818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:09,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:09,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:09,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144811949] [2021-06-05 22:15:09,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:09,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:09,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:09,659 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:09,760 INFO L93 Difference]: Finished difference Result 71 states and 137 transitions. [2021-06-05 22:15:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:09,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:09,760 INFO L225 Difference]: With dead ends: 71 [2021-06-05 22:15:09,760 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 22:15:09,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 22:15:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-06-05 22:15:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 22:15:09,763 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 22:15:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:09,763 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 22:15:09,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 22:15:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:09,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:09,763 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:09,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 22:15:09,985 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1097366315, now seen corresponding path program 42 times [2021-06-05 22:15:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:09,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019126763] [2021-06-05 22:15:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:10,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019126763] [2021-06-05 22:15:10,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019126763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689241257] [2021-06-05 22:15:10,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:10,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:15:10,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:10,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:10,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:10,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:10,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:10,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:10,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:10,218 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:15:10,218 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:10,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:15:10,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:15:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689241257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:10,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:10,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209886642] [2021-06-05 22:15:10,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:10,240 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:10,316 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-06-05 22:15:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:10,317 INFO L225 Difference]: With dead ends: 66 [2021-06-05 22:15:10,317 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 22:15:10,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 22:15:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-06-05 22:15:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 22:15:10,319 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 22:15:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:10,319 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 22:15:10,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 22:15:10,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:10,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:10,320 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:10,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 22:15:10,525 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash 114798790, now seen corresponding path program 43 times [2021-06-05 22:15:10,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:10,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719061389] [2021-06-05 22:15:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:10,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719061389] [2021-06-05 22:15:10,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719061389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501316056] [2021-06-05 22:15:10,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:10,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:10,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:10,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:10,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:10,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:10,781 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:15:10,781 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:10,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:10,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:10,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501316056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:10,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:10,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:10,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115400923] [2021-06-05 22:15:10,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:10,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:10,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:10,828 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:11,079 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-05 22:15:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:15:11,079 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:11,080 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:15:11,080 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 22:15:11,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 22:15:11,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-06-05 22:15:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 22:15:11,082 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 22:15:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:11,082 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 22:15:11,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 22:15:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:11,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:11,082 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:11,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 22:15:11,293 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash -138356475, now seen corresponding path program 44 times [2021-06-05 22:15:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:11,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499284015] [2021-06-05 22:15:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:11,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:11,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499284015] [2021-06-05 22:15:11,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499284015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:11,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529650970] [2021-06-05 22:15:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:11,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:11,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:11,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:11,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:11,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:11,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:11,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:11,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:11,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:11,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:11,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:11,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:11,587 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:15:11,587 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:11,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:11,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:15:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:11,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529650970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:11,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:11,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:11,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437718110] [2021-06-05 22:15:11,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:11,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:11,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:11,633 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:11,754 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2021-06-05 22:15:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:11,758 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:15:11,758 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:15:11,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:15:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 22:15:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 22:15:11,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 22:15:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:11,760 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 22:15:11,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 22:15:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:11,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:11,761 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:11,981 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -585694198, now seen corresponding path program 45 times [2021-06-05 22:15:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417962365] [2021-06-05 22:15:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417962365] [2021-06-05 22:15:12,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417962365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359805937] [2021-06-05 22:15:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:12,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:12,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:12,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:12,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:12,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:12,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:12,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,252 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:15:12,252 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:12,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:12,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359805937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:12,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:12,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162126054] [2021-06-05 22:15:12,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:12,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:12,297 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:12,428 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 22:15:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:12,429 INFO L225 Difference]: With dead ends: 70 [2021-06-05 22:15:12,429 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 22:15:12,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 22:15:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-06-05 22:15:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 22:15:12,430 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 22:15:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:12,430 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 22:15:12,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 22:15:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:12,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:12,431 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:12,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 22:15:12,631 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1726475853, now seen corresponding path program 46 times [2021-06-05 22:15:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:12,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125576904] [2021-06-05 22:15:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125576904] [2021-06-05 22:15:12,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125576904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131105267] [2021-06-05 22:15:12,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:12,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:12,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:12,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:12,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:12,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:12,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:12,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:12,855 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:15:12,855 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:12,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:12,856 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:15:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:12,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131105267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:12,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:12,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:12,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221879866] [2021-06-05 22:15:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:12,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:12,927 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:13,084 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2021-06-05 22:15:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:13,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:13,085 INFO L225 Difference]: With dead ends: 69 [2021-06-05 22:15:13,085 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 22:15:13,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 22:15:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-06-05 22:15:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 22:15:13,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 22:15:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:13,087 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 22:15:13,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 22:15:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:13,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:13,088 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:13,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:13,288 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:13,288 INFO L82 PathProgramCache]: Analyzing trace with hash 702544112, now seen corresponding path program 47 times [2021-06-05 22:15:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:13,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471138503] [2021-06-05 22:15:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:13,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471138503] [2021-06-05 22:15:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471138503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009205414] [2021-06-05 22:15:13,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:13,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:13,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:13,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:13,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:13,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:13,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:13,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:13,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:13,485 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:15:13,485 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:13,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:13,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:15:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:13,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009205414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:13,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:13,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:13,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121768408] [2021-06-05 22:15:13,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:13,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:13,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:13,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:13,559 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:13,786 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-06-05 22:15:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:13,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:13,787 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:15:13,787 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:15:13,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:15:13,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 22:15:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 22:15:13,789 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 22:15:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:13,789 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 22:15:13,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 22:15:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:13,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:13,789 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:14,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,009 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 449388847, now seen corresponding path program 48 times [2021-06-05 22:15:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:14,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143543211] [2021-06-05 22:15:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:14,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143543211] [2021-06-05 22:15:14,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143543211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:14,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425552965] [2021-06-05 22:15:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:14,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:14,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:14,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:14,305 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:15:14,306 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:14,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:14,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:14,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:14,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-06-05 22:15:14,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:14,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:14,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425552965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:14,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:14,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:14,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545563329] [2021-06-05 22:15:14,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:14,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:14,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:14,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:14,375 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:14,509 INFO L93 Difference]: Finished difference Result 88 states and 170 transitions. [2021-06-05 22:15:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:15:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:14,510 INFO L225 Difference]: With dead ends: 88 [2021-06-05 22:15:14,510 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 22:15:14,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:14,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 22:15:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2021-06-05 22:15:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 22:15:14,512 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 22:15:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:14,512 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 22:15:14,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 22:15:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:14,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:14,513 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:14,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,725 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2051124, now seen corresponding path program 49 times [2021-06-05 22:15:14,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:14,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71157103] [2021-06-05 22:15:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:14,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71157103] [2021-06-05 22:15:14,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71157103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114451833] [2021-06-05 22:15:14,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:14,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:14,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:14,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:14,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:14,959 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:15:14,959 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:14,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:14,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:15:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114451833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:15,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:15,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713055344] [2021-06-05 22:15:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:15,001 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:15,173 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2021-06-05 22:15:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:15:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:15,174 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:15:15,174 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:15:15,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:15:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-06-05 22:15:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 22:15:15,176 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 22:15:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:15,176 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 22:15:15,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 22:15:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:15,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:15,177 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:15,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:15,393 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1980746121, now seen corresponding path program 50 times [2021-06-05 22:15:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:15,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990685336] [2021-06-05 22:15:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:15,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:15,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990685336] [2021-06-05 22:15:15,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990685336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:15,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245611702] [2021-06-05 22:15:15,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:15,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:15,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:15,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:15,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:15,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,656 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:15:15,656 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:15,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:15,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:15,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:15,674 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-06-05 22:15:15,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:15,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245611702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:15,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:15,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819341332] [2021-06-05 22:15:15,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:15,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:15,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:15,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:15,746 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:16,003 INFO L93 Difference]: Finished difference Result 90 states and 171 transitions. [2021-06-05 22:15:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:15:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:16,006 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:15:16,006 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 22:15:16,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 22:15:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-06-05 22:15:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 22:15:16,008 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 22:15:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:16,008 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 22:15:16,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 22:15:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:16,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:16,008 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:16,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 22:15:16,209 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash -533178678, now seen corresponding path program 51 times [2021-06-05 22:15:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:16,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843722861] [2021-06-05 22:15:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:16,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843722861] [2021-06-05 22:15:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843722861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200594286] [2021-06-05 22:15:16,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:16,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:16,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:16,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:16,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:16,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:16,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:16,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:16,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,440 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:15:16,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:16,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:15:16,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:15:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200594286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:16,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:16,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436209564] [2021-06-05 22:15:16,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:16,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:16,466 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:16,574 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 22:15:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:16,575 INFO L225 Difference]: With dead ends: 69 [2021-06-05 22:15:16,575 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 22:15:16,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 22:15:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 22:15:16,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 22:15:16,576 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 22:15:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:16,576 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 22:15:16,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 22:15:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:16,577 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:16,577 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:16,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 22:15:16,785 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash -905034965, now seen corresponding path program 52 times [2021-06-05 22:15:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:16,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887537792] [2021-06-05 22:15:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:16,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887537792] [2021-06-05 22:15:16,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887537792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:16,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127164717] [2021-06-05 22:15:16,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:16,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:16,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:17,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:17,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:17,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,121 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:15:17,121 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:17,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:17,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:17,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 22:15:17,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:17,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:15:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:17,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127164717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:17,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:17,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225360276] [2021-06-05 22:15:17,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:17,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:17,165 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:17,354 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-05 22:15:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:17,355 INFO L225 Difference]: With dead ends: 63 [2021-06-05 22:15:17,355 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 22:15:17,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 22:15:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-06-05 22:15:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 22:15:17,357 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 22:15:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:17,357 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 22:15:17,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 22:15:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:17,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:17,357 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:17,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:17,558 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1069052448, now seen corresponding path program 53 times [2021-06-05 22:15:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:17,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267158630] [2021-06-05 22:15:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:17,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:17,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267158630] [2021-06-05 22:15:17,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267158630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:17,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157097784] [2021-06-05 22:15:17,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:17,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:17,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:17,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:17,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:17,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:17,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:17,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:17,796 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:15:17,796 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:17,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:17,797 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:15:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:17,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157097784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:17,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:17,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:17,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870613213] [2021-06-05 22:15:17,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:17,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:17,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:17,853 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:18,270 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-06-05 22:15:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:18,271 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:18,271 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 22:15:18,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 22:15:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-06-05 22:15:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 22:15:18,273 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 22:15:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:18,273 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 22:15:18,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 22:15:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:18,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:18,273 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:18,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:18,474 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:18,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:18,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1322207713, now seen corresponding path program 54 times [2021-06-05 22:15:18,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:18,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782634330] [2021-06-05 22:15:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:18,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:18,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782634330] [2021-06-05 22:15:18,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782634330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:18,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121444621] [2021-06-05 22:15:18,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:18,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:18,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:18,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:18,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:18,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:18,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:18,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:18,739 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:15:18,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:18,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:18,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:18,757 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:18,757 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 22:15:18,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:18,765 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:18,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121444621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:18,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:18,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:18,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280060491] [2021-06-05 22:15:18,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:18,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:18,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:18,818 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:19,038 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 22:15:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:19,045 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:19,045 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:15:19,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:15:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-06-05 22:15:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 22:15:19,047 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 22:15:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:19,047 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 22:15:19,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 22:15:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:19,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:19,048 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:19,265 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1769545436, now seen corresponding path program 55 times [2021-06-05 22:15:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020292173] [2021-06-05 22:15:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:19,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:19,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020292173] [2021-06-05 22:15:19,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020292173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:19,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322186427] [2021-06-05 22:15:19,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:19,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:19,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:19,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:19,493 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 22:15:19,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-05 22:15:19,493 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:19,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-06-05 22:15:19,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:19,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 22:15:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:19,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322186427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:19,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:19,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:19,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882745421] [2021-06-05 22:15:19,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:19,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:19,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:19,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:19,531 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:19,744 INFO L93 Difference]: Finished difference Result 89 states and 168 transitions. [2021-06-05 22:15:19,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:19,745 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:15:19,745 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:15:19,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:15:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 22:15:19,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 22:15:19,747 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 22:15:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:19,747 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 22:15:19,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 22:15:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:19,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:19,747 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:19,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1162 [2021-06-05 22:15:19,948 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash 542624615, now seen corresponding path program 56 times [2021-06-05 22:15:19,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:19,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340073991] [2021-06-05 22:15:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:19,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:19,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340073991] [2021-06-05 22:15:19,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340073991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:19,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892387655] [2021-06-05 22:15:19,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:20,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:20,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:20,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:20,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,222 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:15:20,222 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:15:20,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:20,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:20,241 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 22:15:20,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:15:20,242 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:15:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:20,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892387655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:20,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:20,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:20,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530646550] [2021-06-05 22:15:20,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:20,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:20,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:20,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:20,322 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:20,757 INFO L93 Difference]: Finished difference Result 88 states and 164 transitions. [2021-06-05 22:15:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:15:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:20,758 INFO L225 Difference]: With dead ends: 88 [2021-06-05 22:15:20,758 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:15:20,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:15:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:15:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-06-05 22:15:20,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 22:15:20,760 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 22:15:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:20,760 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 22:15:20,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 22:15:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:20,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:20,760 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:20,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 22:15:20,961 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1990192058, now seen corresponding path program 57 times [2021-06-05 22:15:20,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:20,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83100093] [2021-06-05 22:15:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:21,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83100093] [2021-06-05 22:15:21,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83100093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474234813] [2021-06-05 22:15:21,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:21,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:21,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:21,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:21,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:21,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:21,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:15:21,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,200 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:15:21,200 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:21,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,201 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:15:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474234813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:21,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:21,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718540577] [2021-06-05 22:15:21,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:21,225 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:21,327 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 22:15:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:21,328 INFO L225 Difference]: With dead ends: 73 [2021-06-05 22:15:21,328 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 22:15:21,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 22:15:21,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 22:15:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 22:15:21,330 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 22:15:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:21,330 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 22:15:21,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 22:15:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:21,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:21,330 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:21,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:21,537 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:21,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:21,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1618335771, now seen corresponding path program 58 times [2021-06-05 22:15:21,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:21,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968755359] [2021-06-05 22:15:21,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968755359] [2021-06-05 22:15:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968755359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885082582] [2021-06-05 22:15:21,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:21,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:21,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:21,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:15:21,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:15:21,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,870 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:15:21,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,909 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:15:21,909 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:15:21,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:15:21,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:15:21,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:15:21,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 22:15:21,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:15:21,928 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:15:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885082582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:21,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:15:21,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116752889] [2021-06-05 22:15:21,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:21,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:21,954 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:22,163 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-05 22:15:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:15:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:22,164 INFO L225 Difference]: With dead ends: 80 [2021-06-05 22:15:22,164 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:15:22,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:15:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-05 22:15:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 22:15:22,165 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 22:15:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:22,165 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 22:15:22,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 22:15:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:22,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:22,165 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:22,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 22:15:22,366 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2071591114, now seen corresponding path program 59 times [2021-06-05 22:15:22,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:22,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259150719] [2021-06-05 22:15:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:22,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:22,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259150719] [2021-06-05 22:15:22,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259150719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:22,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515456773] [2021-06-05 22:15:22,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:22,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:22,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:22,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:22,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515456773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:22,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:22,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:15:22,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076722431] [2021-06-05 22:15:22,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:22,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:22,536 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:22,689 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 22:15:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:15:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:22,695 INFO L225 Difference]: With dead ends: 81 [2021-06-05 22:15:22,695 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:15:22,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:15:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 22:15:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 22:15:22,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 22:15:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:22,697 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 22:15:22,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 22:15:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 22:15:22,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:22,698 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:22,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 22:15:22,921 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash 99296973, now seen corresponding path program 60 times [2021-06-05 22:15:22,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:22,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548327898] [2021-06-05 22:15:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:22,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548327898] [2021-06-05 22:15:22,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548327898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126042672] [2021-06-05 22:15:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:23,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:15:23,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:15:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:23,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126042672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:23,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:23,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:15:23,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645245766] [2021-06-05 22:15:23,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:23,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:23,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:23,132 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:23,298 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 22:15:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 22:15:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:23,299 INFO L225 Difference]: With dead ends: 58 [2021-06-05 22:15:23,299 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 22:15:23,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 22:15:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 22:15:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 22:15:23,301 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 22:15:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:23,301 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 22:15:23,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 22:15:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:23,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:23,302 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:23,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:23,521 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2072597181, now seen corresponding path program 61 times [2021-06-05 22:15:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:23,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056880632] [2021-06-05 22:15:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:23,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:23,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056880632] [2021-06-05 22:15:23,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056880632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:23,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762404711] [2021-06-05 22:15:23,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762404711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:23,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:23,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:23,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735277611] [2021-06-05 22:15:23,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:23,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:23,880 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:24,304 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 22:15:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:24,304 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:15:24,304 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:15:24,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:15:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-06-05 22:15:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-06-05 22:15:24,306 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-06-05 22:15:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:24,306 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-06-05 22:15:24,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-06-05 22:15:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:24,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:24,306 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:24,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-06-05 22:15:24,507 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1529967491, now seen corresponding path program 62 times [2021-06-05 22:15:24,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:24,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299088208] [2021-06-05 22:15:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:24,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299088208] [2021-06-05 22:15:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299088208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748853543] [2021-06-05 22:15:24,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:24,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:24,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748853543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:24,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:24,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:24,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650157178] [2021-06-05 22:15:24,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:24,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:24,957 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:25,289 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 22:15:25,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:25,289 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:25,289 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:15:25,289 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 22:15:25,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 22:15:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-06-05 22:15:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-06-05 22:15:25,291 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-06-05 22:15:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:25,291 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-06-05 22:15:25,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-06-05 22:15:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:25,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:25,292 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:25,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:25,514 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1289521343, now seen corresponding path program 63 times [2021-06-05 22:15:25,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:25,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313709446] [2021-06-05 22:15:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:25,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313709446] [2021-06-05 22:15:25,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313709446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068170445] [2021-06-05 22:15:25,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:25,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:15:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:25,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:25,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:26,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068170445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:26,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:26,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:15:26,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423830181] [2021-06-05 22:15:26,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:15:26,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:26,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:15:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:26,043 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:26,404 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 22:15:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:26,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:26,405 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:15:26,405 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 22:15:26,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:15:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 22:15:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-06-05 22:15:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-06-05 22:15:26,407 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-06-05 22:15:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:26,407 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-06-05 22:15:26,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-06-05 22:15:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:26,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:26,407 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:26,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:26,609 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:26,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 589028355, now seen corresponding path program 64 times [2021-06-05 22:15:26,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:26,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886365019] [2021-06-05 22:15:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:26,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:26,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886365019] [2021-06-05 22:15:26,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886365019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:26,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98008913] [2021-06-05 22:15:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:26,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:26,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:26,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:26,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98008913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:27,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:27,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 22:15:27,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695891701] [2021-06-05 22:15:27,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:15:27,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:15:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:27,183 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,494 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 22:15:27,709 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 22:15:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:27,716 INFO L93 Difference]: Finished difference Result 115 states and 210 transitions. [2021-06-05 22:15:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:27,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:27,717 INFO L225 Difference]: With dead ends: 115 [2021-06-05 22:15:27,717 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 22:15:27,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:15:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 22:15:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-06-05 22:15:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 22:15:27,719 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 22:15:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:27,719 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 22:15:27,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 22:15:27,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:27,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:27,720 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:27,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1279,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:27,929 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2014354305, now seen corresponding path program 65 times [2021-06-05 22:15:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:27,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856076488] [2021-06-05 22:15:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:28,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856076488] [2021-06-05 22:15:28,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856076488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969043876] [2021-06-05 22:15:28,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:28,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969043876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:28,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:28,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:28,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920377016] [2021-06-05 22:15:28,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:28,298 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,536 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 22:15:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:28,647 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 22:15:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:28,649 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:15:28,649 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 22:15:28,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 22:15:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-06-05 22:15:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 22:15:28,652 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 22:15:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:28,652 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 22:15:28,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 22:15:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:28,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:28,653 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:28,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 22:15:28,873 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1211754831, now seen corresponding path program 66 times [2021-06-05 22:15:28,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:28,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640506992] [2021-06-05 22:15:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:29,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:29,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640506992] [2021-06-05 22:15:29,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640506992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:29,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539202051] [2021-06-05 22:15:29,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:29,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:15:29,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:29,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:29,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539202051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:29,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:29,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:29,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381963016] [2021-06-05 22:15:29,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:29,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:29,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:29,419 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:29,587 INFO L93 Difference]: Finished difference Result 85 states and 162 transitions. [2021-06-05 22:15:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:29,588 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:15:29,588 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 22:15:29,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:29,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 22:15:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-06-05 22:15:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-06-05 22:15:29,589 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-06-05 22:15:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:29,590 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-06-05 22:15:29,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-06-05 22:15:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:29,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:29,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:29,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 22:15:29,813 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:29,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1452200979, now seen corresponding path program 67 times [2021-06-05 22:15:29,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:29,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371269655] [2021-06-05 22:15:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:30,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371269655] [2021-06-05 22:15:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371269655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975269445] [2021-06-05 22:15:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975269445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:30,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:15:30,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297175339] [2021-06-05 22:15:30,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:15:30,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:30,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:15:30,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:30,480 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:30,677 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-06-05 22:15:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:30,677 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:15:30,677 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 22:15:30,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 22:15:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2021-06-05 22:15:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 22:15:30,680 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 22:15:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:30,680 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 22:15:30,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 22:15:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:30,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:30,680 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:30,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-06-05 22:15:30,881 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2142273329, now seen corresponding path program 68 times [2021-06-05 22:15:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:30,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646390473] [2021-06-05 22:15:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:31,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:31,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646390473] [2021-06-05 22:15:31,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646390473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616680767] [2021-06-05 22:15:31,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:31,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:31,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616680767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:31,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:31,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:31,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402589112] [2021-06-05 22:15:31,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:31,202 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:31,389 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 22:15:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:31,390 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:15:31,390 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:15:31,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:15:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2021-06-05 22:15:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2021-06-05 22:15:31,392 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 16 [2021-06-05 22:15:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:31,392 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2021-06-05 22:15:31,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:31,392 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2021-06-05 22:15:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:31,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:31,392 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:31,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 22:15:31,609 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:31,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash -461109331, now seen corresponding path program 69 times [2021-06-05 22:15:31,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:31,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370004045] [2021-06-05 22:15:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:31,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:31,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370004045] [2021-06-05 22:15:31,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370004045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:31,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104810253] [2021-06-05 22:15:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:31,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:32,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104810253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:32,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:32,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:15:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771070415] [2021-06-05 22:15:32,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:15:32,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:15:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:32,379 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:32,644 INFO L93 Difference]: Finished difference Result 89 states and 169 transitions. [2021-06-05 22:15:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:32,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:32,645 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:15:32,645 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:15:32,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 493.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:15:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:15:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-06-05 22:15:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 22:15:32,647 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 16 [2021-06-05 22:15:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:32,647 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 22:15:32,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 22:15:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:32,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:32,648 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:32,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-06-05 22:15:32,849 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash -864455657, now seen corresponding path program 70 times [2021-06-05 22:15:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:32,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153233992] [2021-06-05 22:15:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:33,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:33,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153233992] [2021-06-05 22:15:33,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153233992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:33,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406188245] [2021-06-05 22:15:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:33,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406188245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:33,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:33,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:33,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908880309] [2021-06-05 22:15:33,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:33,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:33,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:33,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:33,281 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:33,440 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 22:15:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:33,440 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:33,441 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:15:33,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:15:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-06-05 22:15:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-06-05 22:15:33,442 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-06-05 22:15:33,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:33,442 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-06-05 22:15:33,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-06-05 22:15:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:33,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:33,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:33,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:33,643 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:33,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1564948645, now seen corresponding path program 71 times [2021-06-05 22:15:33,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:33,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418358037] [2021-06-05 22:15:33,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:33,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:33,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418358037] [2021-06-05 22:15:33,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418358037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550159066] [2021-06-05 22:15:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:33,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:34,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550159066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:34,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:34,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765079267] [2021-06-05 22:15:34,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:34,081 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:34,354 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2021-06-05 22:15:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:34,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:34,355 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:15:34,355 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:15:34,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:15:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-06-05 22:15:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 22:15:34,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 22:15:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:34,357 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 22:15:34,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 22:15:34,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:34,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:34,357 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:34,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-06-05 22:15:34,581 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 126635991, now seen corresponding path program 72 times [2021-06-05 22:15:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951481399] [2021-06-05 22:15:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:34,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:34,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951481399] [2021-06-05 22:15:34,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951481399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413193646] [2021-06-05 22:15:34,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:34,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:34,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:34,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:34,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413193646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:34,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:34,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:34,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101157064] [2021-06-05 22:15:34,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:34,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:34,876 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:35,067 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 22:15:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:35,068 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:15:35,068 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 22:15:35,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 22:15:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-06-05 22:15:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 22:15:35,070 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 22:15:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:35,070 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 22:15:35,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,070 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 22:15:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:35,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:35,071 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:35,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:35,285 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2100178447, now seen corresponding path program 73 times [2021-06-05 22:15:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:35,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862581826] [2021-06-05 22:15:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:35,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:35,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862581826] [2021-06-05 22:15:35,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862581826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:35,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653936421] [2021-06-05 22:15:35,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653936421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:35,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:35,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:35,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253881199] [2021-06-05 22:15:35,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:35,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:35,629 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:35,817 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2021-06-05 22:15:35,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:35,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:35,817 INFO L225 Difference]: With dead ends: 99 [2021-06-05 22:15:35,817 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:15:35,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:15:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-05 22:15:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2021-06-05 22:15:35,819 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 16 [2021-06-05 22:15:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:35,819 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2021-06-05 22:15:35,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2021-06-05 22:15:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:35,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:35,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:36,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 22:15:36,025 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -408593811, now seen corresponding path program 74 times [2021-06-05 22:15:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:36,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924197821] [2021-06-05 22:15:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:36,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924197821] [2021-06-05 22:15:36,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924197821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:36,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387659616] [2021-06-05 22:15:36,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:36,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:36,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387659616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:36,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:36,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:36,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063866205] [2021-06-05 22:15:36,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:36,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:36,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:36,381 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:36,582 INFO L93 Difference]: Finished difference Result 101 states and 194 transitions. [2021-06-05 22:15:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:36,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:36,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:36,583 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:15:36,583 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:15:36,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:15:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2021-06-05 22:15:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 22:15:36,584 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 22:15:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:36,584 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 22:15:36,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:36,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 22:15:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:36,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:36,585 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:36,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 22:15:36,793 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash -235346119, now seen corresponding path program 75 times [2021-06-05 22:15:36,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:36,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490891272] [2021-06-05 22:15:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:36,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490891272] [2021-06-05 22:15:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490891272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050961030] [2021-06-05 22:15:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:37,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:37,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050961030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:37,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:37,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:37,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139332817] [2021-06-05 22:15:37,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:37,124 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:37,265 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 22:15:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:37,266 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:15:37,266 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:15:37,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:15:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-06-05 22:15:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 22:15:37,268 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 22:15:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:37,268 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 22:15:37,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 22:15:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:37,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:37,268 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:37,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-06-05 22:15:37,477 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:37,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:37,477 INFO L82 PathProgramCache]: Analyzing trace with hash -305800893, now seen corresponding path program 76 times [2021-06-05 22:15:37,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:37,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738874998] [2021-06-05 22:15:37,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:37,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738874998] [2021-06-05 22:15:37,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738874998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953477903] [2021-06-05 22:15:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:37,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953477903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:37,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:37,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641135471] [2021-06-05 22:15:37,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:37,922 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:38,090 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 22:15:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:38,090 INFO L225 Difference]: With dead ends: 94 [2021-06-05 22:15:38,090 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:15:38,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:15:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-06-05 22:15:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 22:15:38,092 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 22:15:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:38,092 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 22:15:38,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 22:15:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:38,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:38,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:38,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:38,315 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:38,316 INFO L82 PathProgramCache]: Analyzing trace with hash -546247041, now seen corresponding path program 77 times [2021-06-05 22:15:38,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:38,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904071769] [2021-06-05 22:15:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:38,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:38,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904071769] [2021-06-05 22:15:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904071769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:38,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194667850] [2021-06-05 22:15:38,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:38,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:38,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:38,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194667850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:15:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973785737] [2021-06-05 22:15:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:15:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:15:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:38,773 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:38,962 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 22:15:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:38,963 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:15:38,963 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:15:38,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:15:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-06-05 22:15:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 22:15:38,965 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 22:15:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:38,965 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 22:15:38,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 22:15:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:38,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:38,965 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:39,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:39,179 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:39,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1246740029, now seen corresponding path program 78 times [2021-06-05 22:15:39,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:39,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937055221] [2021-06-05 22:15:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:39,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937055221] [2021-06-05 22:15:39,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937055221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457351382] [2021-06-05 22:15:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:39,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:39,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:39,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457351382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:39,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:39,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:39,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104121221] [2021-06-05 22:15:39,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:39,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:39,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:39,456 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:39,651 INFO L93 Difference]: Finished difference Result 110 states and 214 transitions. [2021-06-05 22:15:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:39,652 INFO L225 Difference]: With dead ends: 110 [2021-06-05 22:15:39,652 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:15:39,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:15:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2021-06-05 22:15:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 165 transitions. [2021-06-05 22:15:39,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 165 transitions. Word has length 16 [2021-06-05 22:15:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:39,654 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 165 transitions. [2021-06-05 22:15:39,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 165 transitions. [2021-06-05 22:15:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:39,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:39,655 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:39,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:39,873 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:39,873 INFO L82 PathProgramCache]: Analyzing trace with hash 444844607, now seen corresponding path program 79 times [2021-06-05 22:15:39,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:39,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598245796] [2021-06-05 22:15:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:40,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598245796] [2021-06-05 22:15:40,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598245796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059178429] [2021-06-05 22:15:40,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059178429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:40,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093546194] [2021-06-05 22:15:40,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:40,201 INFO L87 Difference]: Start difference. First operand 78 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:40,394 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 22:15:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:40,395 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:15:40,395 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:15:40,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:15:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-06-05 22:15:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 22:15:40,397 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 22:15:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:40,397 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 22:15:40,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 22:15:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:40,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:40,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:40,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:40,601 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash 41498281, now seen corresponding path program 80 times [2021-06-05 22:15:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:40,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495760106] [2021-06-05 22:15:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:40,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495760106] [2021-06-05 22:15:40,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495760106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080622165] [2021-06-05 22:15:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:40,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:40,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:40,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:40,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080622165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:40,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:40,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568917055] [2021-06-05 22:15:40,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:40,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:40,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:40,951 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:41,102 INFO L93 Difference]: Finished difference Result 93 states and 187 transitions. [2021-06-05 22:15:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:41,103 INFO L225 Difference]: With dead ends: 93 [2021-06-05 22:15:41,103 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:15:41,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:15:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-06-05 22:15:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 22:15:41,105 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 22:15:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:41,105 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 22:15:41,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 22:15:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:41,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:41,106 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:41,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:41,309 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash -658994707, now seen corresponding path program 81 times [2021-06-05 22:15:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:41,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812298406] [2021-06-05 22:15:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:41,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:41,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812298406] [2021-06-05 22:15:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812298406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:41,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562326752] [2021-06-05 22:15:41,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:41,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:41,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:41,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562326752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:41,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:41,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:41,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038977036] [2021-06-05 22:15:41,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:41,681 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:41,927 INFO L93 Difference]: Finished difference Result 108 states and 211 transitions. [2021-06-05 22:15:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:41,928 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:15:41,928 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 22:15:41,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 22:15:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 22:15:41,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 22:15:41,930 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 22:15:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:41,930 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 22:15:41,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 22:15:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:41,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:41,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:42,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-06-05 22:15:42,133 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1032589929, now seen corresponding path program 82 times [2021-06-05 22:15:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744441311] [2021-06-05 22:15:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:42,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744441311] [2021-06-05 22:15:42,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744441311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064534561] [2021-06-05 22:15:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:42,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:42,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:42,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064534561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:42,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:42,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:15:42,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830470273] [2021-06-05 22:15:42,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:15:42,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:42,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:15:42,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:42,910 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:43,087 INFO L93 Difference]: Finished difference Result 96 states and 193 transitions. [2021-06-05 22:15:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:43,088 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:15:43,088 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:15:43,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:15:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 22:15:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 22:15:43,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 22:15:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:43,090 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 22:15:43,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 22:15:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:43,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:43,090 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:43,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1864,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:43,290 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:43,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1194224509, now seen corresponding path program 83 times [2021-06-05 22:15:43,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:43,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700968875] [2021-06-05 22:15:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:43,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700968875] [2021-06-05 22:15:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700968875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:43,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772707271] [2021-06-05 22:15:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:43,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:43,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772707271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:43,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:43,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:15:43,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494171884] [2021-06-05 22:15:43,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:15:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:15:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:43,881 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:44,085 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 22:15:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:44,085 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:15:44,085 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:15:44,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:15:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:15:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 22:15:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 22:15:44,087 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 22:15:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:44,087 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 22:15:44,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 22:15:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:44,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:44,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:44,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 22:15:44,288 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:44,288 INFO L82 PathProgramCache]: Analyzing trace with hash 497360127, now seen corresponding path program 84 times [2021-06-05 22:15:44,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:44,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414898847] [2021-06-05 22:15:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:44,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414898847] [2021-06-05 22:15:44,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414898847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974310285] [2021-06-05 22:15:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:44,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:44,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:44,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:44,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974310285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:44,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:44,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:44,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802560657] [2021-06-05 22:15:44,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:44,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:44,582 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:44,764 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-06-05 22:15:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:44,765 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:15:44,765 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 22:15:44,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 22:15:44,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 22:15:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 22:15:44,767 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 22:15:44,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:44,767 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 22:15:44,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 22:15:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:44,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:44,767 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:44,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-05 22:15:44,981 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash 670607819, now seen corresponding path program 85 times [2021-06-05 22:15:44,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:44,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936691212] [2021-06-05 22:15:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:45,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936691212] [2021-06-05 22:15:45,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936691212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634246764] [2021-06-05 22:15:45,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:45,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634246764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:45,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:45,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:45,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3666939] [2021-06-05 22:15:45,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:45,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:45,338 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:45,506 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 22:15:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:45,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:45,507 INFO L225 Difference]: With dead ends: 91 [2021-06-05 22:15:45,507 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:15:45,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:15:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-06-05 22:15:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 22:15:45,508 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 22:15:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:45,508 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 22:15:45,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 22:15:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:45,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:45,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:45,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-06-05 22:15:45,725 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1081734079, now seen corresponding path program 86 times [2021-06-05 22:15:45,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954685440] [2021-06-05 22:15:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:45,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954685440] [2021-06-05 22:15:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954685440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:45,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971730596] [2021-06-05 22:15:45,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:45,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:45,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:46,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971730596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:46,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:46,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:46,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483241289] [2021-06-05 22:15:46,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:46,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:46,090 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:46,253 INFO L93 Difference]: Finished difference Result 94 states and 189 transitions. [2021-06-05 22:15:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:46,254 INFO L225 Difference]: With dead ends: 94 [2021-06-05 22:15:46,254 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:15:46,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:15:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:15:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 22:15:46,256 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 22:15:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:46,256 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 22:15:46,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 22:15:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:46,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:46,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:46,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:46,479 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:46,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash 381241091, now seen corresponding path program 87 times [2021-06-05 22:15:46,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:46,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964983649] [2021-06-05 22:15:46,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964983649] [2021-06-05 22:15:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964983649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798241331] [2021-06-05 22:15:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:46,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:46,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798241331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:47,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:47,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965231574] [2021-06-05 22:15:47,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:47,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:47,380 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:47,562 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 22:15:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:47,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:47,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:47,563 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:15:47,563 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:15:47,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:15:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 22:15:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 22:15:47,564 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 22:15:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:47,564 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 22:15:47,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 22:15:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:47,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:47,565 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:47,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-06-05 22:15:47,765 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2072825727, now seen corresponding path program 88 times [2021-06-05 22:15:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:47,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125282765] [2021-06-05 22:15:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:48,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125282765] [2021-06-05 22:15:48,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125282765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090765944] [2021-06-05 22:15:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:48,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:48,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:48,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090765944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:48,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:48,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:15:48,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966216613] [2021-06-05 22:15:48,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:15:48,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:15:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:48,192 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:48,433 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 22:15:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:48,433 INFO L225 Difference]: With dead ends: 97 [2021-06-05 22:15:48,433 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:15:48,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:48,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:15:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 22:15:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 22:15:48,435 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 22:15:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:48,435 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 22:15:48,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 22:15:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:48,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:48,435 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:48,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-06-05 22:15:48,636 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash -153988711, now seen corresponding path program 89 times [2021-06-05 22:15:48,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:48,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001292594] [2021-06-05 22:15:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:48,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:48,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001292594] [2021-06-05 22:15:48,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001292594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:48,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244488856] [2021-06-05 22:15:48,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:48,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:48,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:48,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:48,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244488856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:48,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:48,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:48,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415493703] [2021-06-05 22:15:48,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:48,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:48,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:48,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:48,962 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,254 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-06-05 22:15:49,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:49,260 INFO L93 Difference]: Finished difference Result 105 states and 206 transitions. [2021-06-05 22:15:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:49,261 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:15:49,261 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 22:15:49,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 22:15:49,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-05 22:15:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 22:15:49,262 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 22:15:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:49,263 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 22:15:49,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:49,263 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 22:15:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:49,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:49,263 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:49,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:49,464 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1537595925, now seen corresponding path program 90 times [2021-06-05 22:15:49,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:49,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085995585] [2021-06-05 22:15:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:49,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:49,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085995585] [2021-06-05 22:15:49,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085995585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:49,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49130482] [2021-06-05 22:15:49,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:49,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:49,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:49,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:49,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:50,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49130482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:50,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:50,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:50,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894286295] [2021-06-05 22:15:50,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:50,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:50,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:50,048 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:50,306 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-06-05 22:15:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:50,306 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:15:50,306 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 22:15:50,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 22:15:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 22:15:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 22:15:50,308 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 22:15:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:50,308 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 22:15:50,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 22:15:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:50,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:50,309 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:50,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2317 [2021-06-05 22:15:50,531 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:50,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1710843617, now seen corresponding path program 91 times [2021-06-05 22:15:50,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:50,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779331293] [2021-06-05 22:15:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:50,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779331293] [2021-06-05 22:15:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779331293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300146256] [2021-06-05 22:15:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:50,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:50,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:51,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300146256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:51,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:51,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:15:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181626606] [2021-06-05 22:15:51,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:15:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:15:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:51,181 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:51,413 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 22:15:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:51,413 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:15:51,413 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 22:15:51,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:15:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 22:15:51,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-06-05 22:15:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 22:15:51,415 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 22:15:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:51,415 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 22:15:51,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 22:15:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:51,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:51,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:51,625 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 433756611, now seen corresponding path program 92 times [2021-06-05 22:15:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606911054] [2021-06-05 22:15:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:51,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:51,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606911054] [2021-06-05 22:15:51,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606911054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:51,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105966776] [2021-06-05 22:15:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:51,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:51,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:51,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105966776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:51,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:51,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:51,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547431967] [2021-06-05 22:15:51,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:51,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:51,971 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:52,233 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-05 22:15:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:52,234 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:52,234 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:15:52,234 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 22:15:52,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 22:15:52,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 22:15:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 22:15:52,236 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 22:15:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:52,236 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 22:15:52,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,236 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 22:15:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:52,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:52,237 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:52,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:52,460 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:52,460 INFO L82 PathProgramCache]: Analyzing trace with hash 2125341247, now seen corresponding path program 93 times [2021-06-05 22:15:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:52,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897626921] [2021-06-05 22:15:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:52,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897626921] [2021-06-05 22:15:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897626921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:52,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878092381] [2021-06-05 22:15:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:52,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:52,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878092381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:52,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:52,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:52,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520161187] [2021-06-05 22:15:52,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:52,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:52,798 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:52,956 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 22:15:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:52,957 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:15:52,957 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:15:52,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:15:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2021-06-05 22:15:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 22:15:52,959 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 22:15:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:52,959 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 22:15:52,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 22:15:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:52,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:52,959 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:53,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:53,165 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1996378357, now seen corresponding path program 94 times [2021-06-05 22:15:53,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:53,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459961189] [2021-06-05 22:15:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:53,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459961189] [2021-06-05 22:15:53,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459961189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046966524] [2021-06-05 22:15:53,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:53,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:53,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:53,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046966524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:53,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:53,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:53,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294493847] [2021-06-05 22:15:53,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:53,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:53,507 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:53,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:53,659 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 22:15:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:53,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:53,660 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:15:53,660 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:15:53,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:15:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 22:15:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 22:15:53,661 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 22:15:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:53,661 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 22:15:53,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 22:15:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:53,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:53,662 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:53,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2410 [2021-06-05 22:15:53,862 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:53,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:53,862 INFO L82 PathProgramCache]: Analyzing trace with hash -920667201, now seen corresponding path program 95 times [2021-06-05 22:15:53,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:53,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509032611] [2021-06-05 22:15:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:54,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509032611] [2021-06-05 22:15:54,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509032611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:54,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295694021] [2021-06-05 22:15:54,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:54,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:54,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:54,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:54,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295694021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:54,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:54,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:54,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531889079] [2021-06-05 22:15:54,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:54,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:54,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:54,300 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:54,451 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-06-05 22:15:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:54,451 INFO L225 Difference]: With dead ends: 93 [2021-06-05 22:15:54,452 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:15:54,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:15:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-06-05 22:15:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 22:15:54,453 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 22:15:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:54,453 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 22:15:54,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 22:15:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:54,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:54,453 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:54,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:54,654 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:54,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1178102735, now seen corresponding path program 96 times [2021-06-05 22:15:54,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:54,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100372607] [2021-06-05 22:15:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:54,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:54,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100372607] [2021-06-05 22:15:54,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100372607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:54,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963193946] [2021-06-05 22:15:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:54,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:15:54,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963193946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:55,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:55,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682679802] [2021-06-05 22:15:55,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:55,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:55,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:55,027 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:55,170 INFO L93 Difference]: Finished difference Result 100 states and 200 transitions. [2021-06-05 22:15:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:55,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:55,171 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:15:55,171 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 22:15:55,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 306.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 22:15:55,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 22:15:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 22:15:55,172 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 22:15:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:55,172 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 22:15:55,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 22:15:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:55,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:55,173 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:55,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-06-05 22:15:55,393 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1418548883, now seen corresponding path program 97 times [2021-06-05 22:15:55,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:55,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083330732] [2021-06-05 22:15:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:55,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083330732] [2021-06-05 22:15:55,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083330732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952984041] [2021-06-05 22:15:55,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:55,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:55,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952984041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:55,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:55,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:15:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009427259] [2021-06-05 22:15:55,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:15:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:15:55,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:55,872 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:56,051 INFO L93 Difference]: Finished difference Result 104 states and 208 transitions. [2021-06-05 22:15:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:56,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:56,052 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:15:56,052 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:15:56,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:15:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:15:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-06-05 22:15:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 22:15:56,053 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 22:15:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:56,053 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 22:15:56,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 22:15:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:56,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:56,054 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:56,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-06-05 22:15:56,254 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2119041871, now seen corresponding path program 98 times [2021-06-05 22:15:56,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:56,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435757571] [2021-06-05 22:15:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:56,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435757571] [2021-06-05 22:15:56,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435757571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:56,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448720401] [2021-06-05 22:15:56,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:56,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:15:56,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:56,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:56,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448720401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:56,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:56,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841660850] [2021-06-05 22:15:56,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:56,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:56,531 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:56,698 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 22:15:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:56,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:56,699 INFO L225 Difference]: With dead ends: 116 [2021-06-05 22:15:56,699 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 22:15:56,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 22:15:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-06-05 22:15:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 22:15:56,700 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 22:15:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:56,701 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 22:15:56,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 22:15:56,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:56,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:56,701 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:56,905 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -427457235, now seen corresponding path program 99 times [2021-06-05 22:15:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973765417] [2021-06-05 22:15:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973765417] [2021-06-05 22:15:57,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973765417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:57,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173829435] [2021-06-05 22:15:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:57,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:15:57,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:57,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173829435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:57,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:57,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374456238] [2021-06-05 22:15:57,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:57,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:57,207 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:57,381 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 22:15:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:57,382 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:15:57,382 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:15:57,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:15:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-06-05 22:15:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 22:15:57,383 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 22:15:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:57,384 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 22:15:57,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 22:15:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:57,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:57,384 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:57,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-06-05 22:15:57,601 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -830803561, now seen corresponding path program 100 times [2021-06-05 22:15:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489443707] [2021-06-05 22:15:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:57,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489443707] [2021-06-05 22:15:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489443707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351237384] [2021-06-05 22:15:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:57,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:15:57,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351237384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:57,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:57,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:15:57,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479111665] [2021-06-05 22:15:57,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:15:57,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:15:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:15:57,989 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:58,143 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 22:15:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:58,144 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:15:58,144 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:15:58,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:15:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:15:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 22:15:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 22:15:58,146 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 22:15:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:58,146 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 22:15:58,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 22:15:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:58,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:58,146 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:58,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-06-05 22:15:58,349 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1531296549, now seen corresponding path program 101 times [2021-06-05 22:15:58,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:58,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365002000] [2021-06-05 22:15:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:58,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:58,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:58,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365002000] [2021-06-05 22:15:58,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365002000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:58,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334660305] [2021-06-05 22:15:58,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:58,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:15:58,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:58,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334660305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:58,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:58,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:15:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489296816] [2021-06-05 22:15:58,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:15:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:15:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:15:58,695 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:15:58,947 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 22:15:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:15:58,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:15:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:15:58,948 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:15:58,948 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:15:58,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:15:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 22:15:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 22:15:58,949 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 22:15:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:15:58,949 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 22:15:58,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:15:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 22:15:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:15:58,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:15:58,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:15:59,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-06-05 22:15:59,150 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:15:59,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:15:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 160288087, now seen corresponding path program 102 times [2021-06-05 22:15:59,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:15:59,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878401128] [2021-06-05 22:15:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:15:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:15:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:59,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:15:59,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878401128] [2021-06-05 22:15:59,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878401128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:59,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210050976] [2021-06-05 22:15:59,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:15:59,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:15:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:15:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:15:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:15:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:15:59,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210050976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:15:59,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:15:59,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:15:59,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157790839] [2021-06-05 22:15:59,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:15:59,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:15:59,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:15:59,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:15:59,904 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:00,136 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 22:16:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:00,137 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:16:00,137 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:16:00,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:16:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 22:16:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 22:16:00,138 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 22:16:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:00,138 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 22:16:00,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 22:16:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:00,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:00,139 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:00,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2568 [2021-06-05 22:16:00,345 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2066526351, now seen corresponding path program 103 times [2021-06-05 22:16:00,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:00,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813242860] [2021-06-05 22:16:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:00,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813242860] [2021-06-05 22:16:00,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813242860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:00,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312370136] [2021-06-05 22:16:00,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312370136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:00,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:00,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:16:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362251415] [2021-06-05 22:16:00,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:00,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:00,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:00,857 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:01,055 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 22:16:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:01,055 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:16:01,055 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:16:01,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:16:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 22:16:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 22:16:01,057 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 22:16:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:01,057 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 22:16:01,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 22:16:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:01,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:01,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:01,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2695,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:01,280 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -374941715, now seen corresponding path program 104 times [2021-06-05 22:16:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:01,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992134820] [2021-06-05 22:16:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:01,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:01,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992134820] [2021-06-05 22:16:01,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992134820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:01,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121441098] [2021-06-05 22:16:01,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:01,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:01,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:01,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121441098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:01,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:01,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:01,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490466510] [2021-06-05 22:16:01,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:01,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:01,610 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:01,823 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 22:16:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:01,824 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:01,824 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:01,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:01,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 22:16:01,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 22:16:01,825 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 22:16:01,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:01,826 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 22:16:01,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:01,826 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 22:16:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:01,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:01,826 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:02,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2729,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:02,049 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -201694023, now seen corresponding path program 105 times [2021-06-05 22:16:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:02,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447197863] [2021-06-05 22:16:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:02,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447197863] [2021-06-05 22:16:02,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447197863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609780020] [2021-06-05 22:16:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:02,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:02,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:02,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609780020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:02,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:02,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:02,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168120804] [2021-06-05 22:16:02,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:02,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:02,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:02,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:02,355 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:02,519 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 22:16:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:02,520 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:16:02,520 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:16:02,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:16:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-06-05 22:16:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 22:16:02,522 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 22:16:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:02,522 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 22:16:02,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 22:16:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:02,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:02,522 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:02,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:02,723 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:02,723 INFO L82 PathProgramCache]: Analyzing trace with hash 209432237, now seen corresponding path program 106 times [2021-06-05 22:16:02,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:02,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784376875] [2021-06-05 22:16:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784376875] [2021-06-05 22:16:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784376875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756157514] [2021-06-05 22:16:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:02,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:03,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756157514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:03,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:03,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:03,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347044243] [2021-06-05 22:16:03,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:03,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:03,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:03,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:03,103 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:03,260 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 22:16:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:03,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:03,261 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:16:03,261 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:16:03,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:16:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 22:16:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 22:16:03,262 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 22:16:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:03,262 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 22:16:03,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 22:16:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:03,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:03,262 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:03,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-05 22:16:03,465 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash -491060751, now seen corresponding path program 107 times [2021-06-05 22:16:03,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:03,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101518830] [2021-06-05 22:16:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:03,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:03,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101518830] [2021-06-05 22:16:03,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101518830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:03,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268424448] [2021-06-05 22:16:03,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:03,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:03,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:04,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268424448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:04,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:04,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:16:04,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129167932] [2021-06-05 22:16:04,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:04,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:04,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:04,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:04,128 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:04,327 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 22:16:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:04,327 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:04,327 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:16:04,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:16:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 22:16:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 22:16:04,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 22:16:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:04,329 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 22:16:04,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 22:16:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:04,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:04,330 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:04,537 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:04,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1200523885, now seen corresponding path program 108 times [2021-06-05 22:16:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580397450] [2021-06-05 22:16:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:04,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580397450] [2021-06-05 22:16:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580397450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914904088] [2021-06-05 22:16:04,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:04,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:04,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914904088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:04,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:04,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:16:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986025760] [2021-06-05 22:16:04,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:04,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:04,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:04,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:04,915 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:05,157 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 22:16:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:05,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:05,157 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:16:05,157 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:16:05,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:16:05,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 22:16:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 22:16:05,159 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 22:16:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:05,159 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 22:16:05,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 22:16:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:05,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:05,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:05,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2890,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:05,365 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1026290553, now seen corresponding path program 109 times [2021-06-05 22:16:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:05,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975313565] [2021-06-05 22:16:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:05,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:05,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975313565] [2021-06-05 22:16:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975313565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:05,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804637101] [2021-06-05 22:16:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804637101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:05,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:05,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32910425] [2021-06-05 22:16:05,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:05,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:05,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:05,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:05,751 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:05,989 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 22:16:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:05,990 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:16:05,990 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:16:05,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:16:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 22:16:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 22:16:05,991 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 22:16:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:05,992 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 22:16:05,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 22:16:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:05,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:05,992 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:06,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2905,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:06,192 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 665294083, now seen corresponding path program 110 times [2021-06-05 22:16:06,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:06,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289453378] [2021-06-05 22:16:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:06,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:06,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289453378] [2021-06-05 22:16:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289453378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:06,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714587665] [2021-06-05 22:16:06,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:06,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:06,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714587665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:06,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:06,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:16:06,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572787285] [2021-06-05 22:16:06,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:06,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:06,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:06,844 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:07,148 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 22:16:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:07,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:07,149 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:07,149 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:07,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 22:16:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 22:16:07,151 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 22:16:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:07,151 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 22:16:07,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 22:16:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:07,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:07,152 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:07,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:07,365 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash 838541775, now seen corresponding path program 111 times [2021-06-05 22:16:07,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:07,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414839109] [2021-06-05 22:16:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:07,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414839109] [2021-06-05 22:16:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414839109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648612710] [2021-06-05 22:16:07,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:07,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:16:07,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648612710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:08,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:08,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 22:16:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254535435] [2021-06-05 22:16:08,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:08,014 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:08,254 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 22:16:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:08,254 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:16:08,255 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:16:08,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:16:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-06-05 22:16:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 22:16:08,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 22:16:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:08,256 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 22:16:08,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 22:16:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:08,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:08,256 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:08,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:08,457 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:08,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:08,457 INFO L82 PathProgramCache]: Analyzing trace with hash -438545231, now seen corresponding path program 112 times [2021-06-05 22:16:08,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:08,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806752507] [2021-06-05 22:16:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:08,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:08,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806752507] [2021-06-05 22:16:08,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806752507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:08,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694559926] [2021-06-05 22:16:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:08,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:08,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:08,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694559926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:08,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:08,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180892158] [2021-06-05 22:16:08,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:08,755 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:08,945 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 22:16:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:08,946 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:08,946 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:08,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-06-05 22:16:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 22:16:08,947 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 22:16:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:08,947 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 22:16:08,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 22:16:08,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:08,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:08,947 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2986 [2021-06-05 22:16:09,148 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1253039405, now seen corresponding path program 113 times [2021-06-05 22:16:09,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:09,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683463754] [2021-06-05 22:16:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:09,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683463754] [2021-06-05 22:16:09,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683463754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427107357] [2021-06-05 22:16:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:09,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:09,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:09,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:09,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427107357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:09,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:09,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449159648] [2021-06-05 22:16:09,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:09,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:09,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:09,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:09,482 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:09,665 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 22:16:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:09,665 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:09,665 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:16:09,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:09,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:16:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2021-06-05 22:16:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 22:16:09,667 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 22:16:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:09,667 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 22:16:09,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 22:16:09,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:09,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:09,668 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:09,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2996,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:09,877 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:09,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1426287097, now seen corresponding path program 114 times [2021-06-05 22:16:09,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:09,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785954367] [2021-06-05 22:16:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:10,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:10,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785954367] [2021-06-05 22:16:10,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785954367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:10,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409106246] [2021-06-05 22:16:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:10,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:16:10,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:10,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:10,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409106246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:10,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:10,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823490073] [2021-06-05 22:16:10,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:10,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:10,188 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:10,363 INFO L93 Difference]: Finished difference Result 100 states and 199 transitions. [2021-06-05 22:16:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:10,364 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:16:10,364 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 22:16:10,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 22:16:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 22:16:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 22:16:10,365 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 22:16:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:10,365 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 22:16:10,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 22:16:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:10,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:10,365 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:10,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 22:16:10,569 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1792969043, now seen corresponding path program 115 times [2021-06-05 22:16:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:10,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815266546] [2021-06-05 22:16:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:10,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815266546] [2021-06-05 22:16:10,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815266546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720164479] [2021-06-05 22:16:10,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:10,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:10,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720164479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:10,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:10,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:10,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332616611] [2021-06-05 22:16:10,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:10,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:10,996 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:11,173 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 22:16:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:11,173 INFO L225 Difference]: With dead ends: 97 [2021-06-05 22:16:11,173 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:16:11,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:16:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 22:16:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 22:16:11,175 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 22:16:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:11,175 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 22:16:11,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 22:16:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:11,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:11,175 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:11,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3027 [2021-06-05 22:16:11,389 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1124513725, now seen corresponding path program 116 times [2021-06-05 22:16:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:11,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931490401] [2021-06-05 22:16:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:11,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:11,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931490401] [2021-06-05 22:16:11,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931490401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702766947] [2021-06-05 22:16:11,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:11,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:11,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702766947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:11,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:11,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:11,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894843816] [2021-06-05 22:16:11,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:11,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:11,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:11,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:11,766 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:11,943 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 22:16:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:11,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:11,944 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:16:11,944 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:16:11,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:16:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-06-05 22:16:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 22:16:11,945 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 22:16:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:11,945 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 22:16:11,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 22:16:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:11,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:11,946 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:12,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:12,161 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash 424020737, now seen corresponding path program 117 times [2021-06-05 22:16:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50860160] [2021-06-05 22:16:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:12,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50860160] [2021-06-05 22:16:12,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50860160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520539118] [2021-06-05 22:16:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:12,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:12,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:12,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:12,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520539118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:12,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:12,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:12,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296162759] [2021-06-05 22:16:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:12,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:12,515 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:12,677 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 22:16:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:12,678 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:12,678 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:16:12,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:16:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-06-05 22:16:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 22:16:12,679 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 22:16:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:12,679 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 22:16:12,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 22:16:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:12,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:12,679 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:12,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:12,880 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2115605373, now seen corresponding path program 118 times [2021-06-05 22:16:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399940445] [2021-06-05 22:16:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:13,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399940445] [2021-06-05 22:16:13,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399940445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933604926] [2021-06-05 22:16:13,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:13,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:13,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:13,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933604926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:13,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:13,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:13,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789627623] [2021-06-05 22:16:13,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:13,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:13,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:13,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:13,182 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:13,366 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-05 22:16:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:13,366 INFO L225 Difference]: With dead ends: 101 [2021-06-05 22:16:13,366 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:16:13,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:16:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-06-05 22:16:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 22:16:13,368 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 22:16:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:13,368 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 22:16:13,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 22:16:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:13,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:13,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:13,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-06-05 22:16:13,569 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash -111209065, now seen corresponding path program 119 times [2021-06-05 22:16:13,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:13,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023129103] [2021-06-05 22:16:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:13,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:13,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023129103] [2021-06-05 22:16:13,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023129103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:13,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717683678] [2021-06-05 22:16:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:13,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:13,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:13,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717683678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:13,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:13,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 22:16:13,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10052597] [2021-06-05 22:16:13,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:13,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:13,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:13,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:13,884 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:14,122 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 22:16:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:14,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:14,123 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:16:14,123 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:16:14,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:16:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 22:16:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 22:16:14,124 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 22:16:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:14,124 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 22:16:14,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 22:16:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:14,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:14,125 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:14,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:14,325 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375571, now seen corresponding path program 120 times [2021-06-05 22:16:14,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:14,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775835142] [2021-06-05 22:16:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:14,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:14,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775835142] [2021-06-05 22:16:14,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775835142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:14,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462233991] [2021-06-05 22:16:14,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:14,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:14,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462233991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:14,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:14,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 22:16:14,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207966129] [2021-06-05 22:16:14,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:14,785 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:14,996 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 22:16:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:14,997 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:14,997 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:14,997 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:14,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-06-05 22:16:14,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 22:16:14,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 22:16:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:14,998 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 22:16:14,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 22:16:14,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:14,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:14,999 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:15,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3117,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:15,199 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:15,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1753623263, now seen corresponding path program 121 times [2021-06-05 22:16:15,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:15,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357986881] [2021-06-05 22:16:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:15,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357986881] [2021-06-05 22:16:15,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357986881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461188728] [2021-06-05 22:16:15,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:15,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:15,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461188728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:15,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:15,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 22:16:15,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520537716] [2021-06-05 22:16:15,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:15,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:15,632 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:15,829 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 22:16:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:15,829 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:16:15,829 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:16:15,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:16:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 22:16:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 22:16:15,830 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 22:16:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:15,831 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 22:16:15,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 22:16:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:15,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:15,831 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:16,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 22:16:16,031 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 476536257, now seen corresponding path program 122 times [2021-06-05 22:16:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:16,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805251464] [2021-06-05 22:16:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:16,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805251464] [2021-06-05 22:16:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805251464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529484139] [2021-06-05 22:16:16,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:16,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529484139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:16,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:16,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:16,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515098660] [2021-06-05 22:16:16,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:16,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:16,335 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:16,530 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 22:16:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:16,530 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:16,530 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:16,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2021-06-05 22:16:16,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 22:16:16,532 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 22:16:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 22:16:16,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 22:16:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:16,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:16,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:16,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-06-05 22:16:16,745 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2126846403, now seen corresponding path program 123 times [2021-06-05 22:16:16,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:16,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165674865] [2021-06-05 22:16:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:17,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165674865] [2021-06-05 22:16:17,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165674865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:17,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063796040] [2021-06-05 22:16:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:17,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:16:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:17,342 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 22:16:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:17,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063796040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:17,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:17,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 22:16:17,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328969277] [2021-06-05 22:16:17,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:16:17,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:16:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:17,731 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:18,026 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 22:16:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:18,027 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:18,027 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:16:18,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:16:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2021-06-05 22:16:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 22:16:18,028 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 22:16:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:18,029 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 22:16:18,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 22:16:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:18,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:18,029 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:18,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-06-05 22:16:18,229 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1953598711, now seen corresponding path program 124 times [2021-06-05 22:16:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:18,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239191426] [2021-06-05 22:16:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:18,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239191426] [2021-06-05 22:16:18,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239191426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933035828] [2021-06-05 22:16:18,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:18,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933035828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:18,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:18,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815881780] [2021-06-05 22:16:18,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:18,615 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:18,806 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-06-05 22:16:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:18,807 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:16:18,807 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 22:16:18,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 22:16:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-06-05 22:16:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 22:16:18,808 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 22:16:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:18,808 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 22:16:18,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 22:16:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:18,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:18,808 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:19,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-06-05 22:16:19,009 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash -877887555, now seen corresponding path program 125 times [2021-06-05 22:16:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:19,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201366935] [2021-06-05 22:16:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:19,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201366935] [2021-06-05 22:16:19,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201366935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779825111] [2021-06-05 22:16:19,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:19,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:19,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:19,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:19,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779825111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:19,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:19,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:19,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316873655] [2021-06-05 22:16:19,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:19,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:19,405 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:19,582 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-05 22:16:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:19,582 INFO L225 Difference]: With dead ends: 97 [2021-06-05 22:16:19,582 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:16:19,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:16:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-06-05 22:16:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 22:16:19,584 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 22:16:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:19,584 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 22:16:19,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 22:16:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:19,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:19,584 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:19,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:19,785 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:19,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:19,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1295060303, now seen corresponding path program 126 times [2021-06-05 22:16:19,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:19,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788637092] [2021-06-05 22:16:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:19,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:19,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788637092] [2021-06-05 22:16:19,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788637092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:19,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636757797] [2021-06-05 22:16:19,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:19,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:20,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636757797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:20,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:20,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:20,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695130254] [2021-06-05 22:16:20,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:20,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:20,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:20,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:20,114 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:20,439 INFO L93 Difference]: Finished difference Result 132 states and 254 transitions. [2021-06-05 22:16:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:20,440 INFO L225 Difference]: With dead ends: 132 [2021-06-05 22:16:20,440 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 22:16:20,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 22:16:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-06-05 22:16:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 79 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 171 transitions. [2021-06-05 22:16:20,441 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 171 transitions. Word has length 16 [2021-06-05 22:16:20,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:20,441 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 171 transitions. [2021-06-05 22:16:20,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:20,441 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 171 transitions. [2021-06-05 22:16:20,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:20,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:20,442 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:20,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-06-05 22:16:20,653 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 396524333, now seen corresponding path program 127 times [2021-06-05 22:16:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:20,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789419800] [2021-06-05 22:16:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:20,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789419800] [2021-06-05 22:16:20,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789419800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867466604] [2021-06-05 22:16:20,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:20,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867466604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:20,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:20,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596464908] [2021-06-05 22:16:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:20,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:20,969 INFO L87 Difference]: Start difference. First operand 80 states and 171 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:21,269 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-05 22:16:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:21,270 INFO L225 Difference]: With dead ends: 134 [2021-06-05 22:16:21,270 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 22:16:21,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 408.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 22:16:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-06-05 22:16:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 22:16:21,271 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 22:16:21,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:21,272 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 22:16:21,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 22:16:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:21,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:21,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:21,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:21,472 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash 569772025, now seen corresponding path program 128 times [2021-06-05 22:16:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:21,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404494734] [2021-06-05 22:16:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:21,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404494734] [2021-06-05 22:16:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404494734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:21,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268256030] [2021-06-05 22:16:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:21,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:21,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:21,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268256030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:21,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:21,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:21,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973473354] [2021-06-05 22:16:21,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:21,858 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:22,105 INFO L93 Difference]: Finished difference Result 121 states and 235 transitions. [2021-06-05 22:16:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:22,106 INFO L225 Difference]: With dead ends: 121 [2021-06-05 22:16:22,106 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 22:16:22,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:22,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 22:16:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-06-05 22:16:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-06-05 22:16:22,108 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-06-05 22:16:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:22,108 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-06-05 22:16:22,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-06-05 22:16:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:22,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:22,108 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:22,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 22:16:22,317 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1645483181, now seen corresponding path program 129 times [2021-06-05 22:16:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:22,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050831253] [2021-06-05 22:16:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:22,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:22,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050831253] [2021-06-05 22:16:22,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050831253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:22,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003310477] [2021-06-05 22:16:22,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:22,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:16:22,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:22,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003310477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:22,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:22,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417920997] [2021-06-05 22:16:22,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:22,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:22,645 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:22,940 INFO L93 Difference]: Finished difference Result 120 states and 232 transitions. [2021-06-05 22:16:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:22,940 INFO L225 Difference]: With dead ends: 120 [2021-06-05 22:16:22,940 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:16:22,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:16:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 22:16:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 22:16:22,942 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 22:16:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:22,942 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 22:16:22,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 22:16:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:16:22,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:22,942 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:23,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:23,157 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash 126444383, now seen corresponding path program 130 times [2021-06-05 22:16:23,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:23,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389655713] [2021-06-05 22:16:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389655713] [2021-06-05 22:16:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389655713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664811391] [2021-06-05 22:16:23,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:23,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:23,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:23,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:16:23,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664811391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:23,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:23,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 22:16:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114523176] [2021-06-05 22:16:23,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:16:23,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:16:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:16:23,476 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:23,867 INFO L93 Difference]: Finished difference Result 117 states and 226 transitions. [2021-06-05 22:16:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:16:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:23,868 INFO L225 Difference]: With dead ends: 117 [2021-06-05 22:16:23,868 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 22:16:23,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 22:16:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-06-05 22:16:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 22:16:23,869 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 22:16:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:23,869 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 22:16:23,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 22:16:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:23,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:23,870 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:24,070 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash -662723303, now seen corresponding path program 131 times [2021-06-05 22:16:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547871799] [2021-06-05 22:16:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:24,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:24,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547871799] [2021-06-05 22:16:24,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547871799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:24,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991955524] [2021-06-05 22:16:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:24,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:24,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:24,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:24,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991955524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:24,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:24,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:24,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216750536] [2021-06-05 22:16:24,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:24,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:24,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:24,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:24,292 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:24,598 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 22:16:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:24,598 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:24,598 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 22:16:24,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 22:16:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2021-06-05 22:16:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 154 transitions. [2021-06-05 22:16:24,599 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 154 transitions. Word has length 17 [2021-06-05 22:16:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:24,600 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 154 transitions. [2021-06-05 22:16:24,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 154 transitions. [2021-06-05 22:16:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:24,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:24,600 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:24,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:24,800 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 17715690, now seen corresponding path program 132 times [2021-06-05 22:16:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:24,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286511841] [2021-06-05 22:16:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286511841] [2021-06-05 22:16:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286511841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:24,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021967858] [2021-06-05 22:16:24,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:24,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:24,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:24,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:24,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:24,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:24,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:24,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:24,993 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:24,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:24,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021967858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:25,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:25,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:25,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443451263] [2021-06-05 22:16:25,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:25,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:25,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:25,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:25,030 INFO L87 Difference]: Start difference. First operand 74 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:25,200 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-06-05 22:16:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:25,200 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:25,201 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 22:16:25,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 22:16:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2021-06-05 22:16:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 74 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 157 transitions. [2021-06-05 22:16:25,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 157 transitions. Word has length 17 [2021-06-05 22:16:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:25,202 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 157 transitions. [2021-06-05 22:16:25,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 157 transitions. [2021-06-05 22:16:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:25,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:25,202 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:25,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:25,405 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash -652368167, now seen corresponding path program 133 times [2021-06-05 22:16:25,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:25,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583760316] [2021-06-05 22:16:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:25,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:25,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583760316] [2021-06-05 22:16:25,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583760316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:25,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453905105] [2021-06-05 22:16:25,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453905105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:25,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:25,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:16:25,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228153052] [2021-06-05 22:16:25,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:25,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:25,670 INFO L87 Difference]: Start difference. First operand 75 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:25,924 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 22:16:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:25,925 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:25,925 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:25,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 22:16:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 22:16:25,926 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 22:16:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:25,926 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 22:16:25,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 22:16:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:25,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:25,926 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:26,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:26,127 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 878558040, now seen corresponding path program 134 times [2021-06-05 22:16:26,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:26,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864719499] [2021-06-05 22:16:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:26,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864719499] [2021-06-05 22:16:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864719499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:26,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703129022] [2021-06-05 22:16:26,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:26,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:26,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:26,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:26,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:26,321 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:26,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703129022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:26,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:26,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:26,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394490983] [2021-06-05 22:16:26,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:26,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:26,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:26,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:26,350 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:26,507 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2021-06-05 22:16:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:26,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:26,508 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:16:26,508 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:16:26,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:16:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2021-06-05 22:16:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 22:16:26,509 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 22:16:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:26,509 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 22:16:26,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 22:16:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:26,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:26,509 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:26,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-06-05 22:16:26,710 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:26,710 INFO L82 PathProgramCache]: Analyzing trace with hash 483735837, now seen corresponding path program 135 times [2021-06-05 22:16:26,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:26,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849699268] [2021-06-05 22:16:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849699268] [2021-06-05 22:16:26,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849699268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165605239] [2021-06-05 22:16:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:26,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:16:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:26,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:26,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:26,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:26,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:26,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:26,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:26,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:27,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:27,014 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:27,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:27,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:27,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165605239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:27,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:27,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972943505] [2021-06-05 22:16:27,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:27,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:27,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:27,063 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:27,357 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 22:16:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:16:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:27,357 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:27,357 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 22:16:27,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:16:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 22:16:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2021-06-05 22:16:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 22:16:27,359 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 22:16:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:27,359 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 22:16:27,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 22:16:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:27,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:27,359 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:27,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:27,560 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1225857214, now seen corresponding path program 136 times [2021-06-05 22:16:27,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:27,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192659433] [2021-06-05 22:16:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:27,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:27,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192659433] [2021-06-05 22:16:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192659433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:27,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990114943] [2021-06-05 22:16:27,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:27,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:27,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:27,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:27,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:27,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:27,781 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:27,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:27,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990114943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:27,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:27,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:27,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117755339] [2021-06-05 22:16:27,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:27,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:27,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:27,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:27,807 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:27,927 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 22:16:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:27,927 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:16:27,927 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:16:27,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:16:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2021-06-05 22:16:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 22:16:27,928 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 22:16:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 22:16:27,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 22:16:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:27,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:27,929 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-06-05 22:16:28,130 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -9865576, now seen corresponding path program 137 times [2021-06-05 22:16:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914203602] [2021-06-05 22:16:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:28,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:28,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914203602] [2021-06-05 22:16:28,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914203602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:28,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480685283] [2021-06-05 22:16:28,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:28,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:16:28,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:28,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:28,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480685283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:28,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:28,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:16:28,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855536116] [2021-06-05 22:16:28,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:28,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:28,410 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:28,694 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-06-05 22:16:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:28,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:28,695 INFO L225 Difference]: With dead ends: 125 [2021-06-05 22:16:28,695 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 22:16:28,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:16:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 22:16:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-06-05 22:16:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 22:16:28,696 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 22:16:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:28,696 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 22:16:28,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 22:16:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:28,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:28,697 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:28,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:28,919 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:28,919 INFO L82 PathProgramCache]: Analyzing trace with hash -457203299, now seen corresponding path program 138 times [2021-06-05 22:16:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:28,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421726015] [2021-06-05 22:16:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:29,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421726015] [2021-06-05 22:16:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421726015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432269523] [2021-06-05 22:16:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:29,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:29,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432269523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:29,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:29,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:16:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455644403] [2021-06-05 22:16:29,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:29,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:29,140 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:29,414 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2021-06-05 22:16:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:29,414 INFO L225 Difference]: With dead ends: 116 [2021-06-05 22:16:29,415 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 22:16:29,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:16:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 22:16:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 22:16:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 22:16:29,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 22:16:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:29,416 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 22:16:29,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 22:16:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:29,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:29,416 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:29,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:29,617 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1854966752, now seen corresponding path program 139 times [2021-06-05 22:16:29,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:29,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856912406] [2021-06-05 22:16:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:29,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856912406] [2021-06-05 22:16:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856912406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103039400] [2021-06-05 22:16:29,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:29,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:29,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:29,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103039400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:29,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:29,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:16:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763082901] [2021-06-05 22:16:29,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:16:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:16:29,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:29,828 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:30,050 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-05 22:16:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:16:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:30,055 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:16:30,055 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 22:16:30,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:16:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 22:16:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2021-06-05 22:16:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 154 transitions. [2021-06-05 22:16:30,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 154 transitions. Word has length 17 [2021-06-05 22:16:30,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:30,056 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 154 transitions. [2021-06-05 22:16:30,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,056 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 154 transitions. [2021-06-05 22:16:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:30,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:30,057 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:30,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 22:16:30,257 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash 253585771, now seen corresponding path program 140 times [2021-06-05 22:16:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:30,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949403672] [2021-06-05 22:16:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:30,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949403672] [2021-06-05 22:16:30,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949403672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496897394] [2021-06-05 22:16:30,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:30,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:30,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:30,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:30,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:30,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:30,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:30,497 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:30,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:30,524 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:30,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:30,525 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:30,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496897394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:30,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:30,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165307766] [2021-06-05 22:16:30,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:30,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:30,567 INFO L87 Difference]: Start difference. First operand 75 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:30,679 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-06-05 22:16:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:30,679 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:16:30,680 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:16:30,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:16:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 22:16:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 22:16:30,681 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 22:16:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:30,681 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 22:16:30,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 22:16:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:30,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:30,681 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:30,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-06-05 22:16:30,897 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1784511978, now seen corresponding path program 141 times [2021-06-05 22:16:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:30,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886917020] [2021-06-05 22:16:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:30,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:30,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886917020] [2021-06-05 22:16:30,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886917020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:30,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517338395] [2021-06-05 22:16:30,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:31,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:31,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:31,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:31,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:31,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:31,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:31,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517338395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:31,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:31,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011217441] [2021-06-05 22:16:31,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:31,146 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:31,246 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2021-06-05 22:16:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:31,246 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:16:31,246 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:16:31,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:16:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-06-05 22:16:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 22:16:31,247 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 22:16:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:31,248 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 22:16:31,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 22:16:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:31,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:31,248 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:31,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-06-05 22:16:31,448 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:31,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1389689775, now seen corresponding path program 142 times [2021-06-05 22:16:31,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:31,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452388380] [2021-06-05 22:16:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:31,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:31,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452388380] [2021-06-05 22:16:31,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452388380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:31,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446573596] [2021-06-05 22:16:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:31,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:31,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:31,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:31,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:31,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:31,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:31,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:31,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:31,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:31,755 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:31,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:31,758 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:31,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446573596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:31,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:31,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723311122] [2021-06-05 22:16:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:31,799 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:31,948 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 22:16:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:31,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:31,948 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:16:31,949 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:16:31,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:16:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 22:16:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 22:16:31,950 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 22:16:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:31,950 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 22:16:31,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 22:16:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:31,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:31,950 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 22:16:32,153 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2131811152, now seen corresponding path program 143 times [2021-06-05 22:16:32,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:32,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080541649] [2021-06-05 22:16:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:32,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080541649] [2021-06-05 22:16:32,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080541649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:32,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859636715] [2021-06-05 22:16:32,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:32,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:32,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:32,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:32,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:32,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:32,368 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:32,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:32,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:32,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859636715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:32,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:32,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365164264] [2021-06-05 22:16:32,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:32,394 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:32,510 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 22:16:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:32,511 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:16:32,511 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:32,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 22:16:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 22:16:32,512 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 22:16:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:32,512 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 22:16:32,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 22:16:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:32,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:32,512 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-06-05 22:16:32,717 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1149243627, now seen corresponding path program 144 times [2021-06-05 22:16:32,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:32,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161734400] [2021-06-05 22:16:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:32,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161734400] [2021-06-05 22:16:32,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161734400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:32,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067058475] [2021-06-05 22:16:32,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:32,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:32,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:32,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:32,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:32,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:32,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:32,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:32,987 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:32,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:32,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:32,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:33,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067058475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:33,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:33,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412104270] [2021-06-05 22:16:33,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:33,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:33,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:33,036 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:33,214 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 22:16:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:33,214 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:16:33,214 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 22:16:33,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 22:16:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2021-06-05 22:16:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:16:33,215 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:16:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:33,216 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:16:33,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:16:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:33,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:33,216 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:33,416 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash 896088362, now seen corresponding path program 145 times [2021-06-05 22:16:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345798353] [2021-06-05 22:16:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:33,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:33,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345798353] [2021-06-05 22:16:33,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345798353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:33,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147152161] [2021-06-05 22:16:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:33,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:33,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:33,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:33,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:33,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:33,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:33,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:33,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:33,660 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:16:33,660 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:33,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:33,661 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147152161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:33,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:33,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:33,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056480206] [2021-06-05 22:16:33,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:33,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:33,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:33,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:33,701 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:33,947 INFO L93 Difference]: Finished difference Result 114 states and 229 transitions. [2021-06-05 22:16:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:33,948 INFO L225 Difference]: With dead ends: 114 [2021-06-05 22:16:33,948 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 22:16:33,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:16:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 22:16:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-06-05 22:16:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:16:33,949 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:16:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:33,949 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:16:33,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:16:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:33,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:33,949 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:34,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:34,153 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 448750639, now seen corresponding path program 146 times [2021-06-05 22:16:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93378385] [2021-06-05 22:16:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:34,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:34,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93378385] [2021-06-05 22:16:34,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93378385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:34,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811359931] [2021-06-05 22:16:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:34,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:34,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:34,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:34,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:34,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:34,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:34,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:34,439 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:34,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:34,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:34,440 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:34,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811359931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:34,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:34,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:34,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685959978] [2021-06-05 22:16:34,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:34,481 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:34,586 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 22:16:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:34,587 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:16:34,587 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 22:16:34,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 22:16:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-05 22:16:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-06-05 22:16:34,588 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 17 [2021-06-05 22:16:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:34,588 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-06-05 22:16:34,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-06-05 22:16:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:34,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:34,588 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:34,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3437 [2021-06-05 22:16:34,789 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1865041723, now seen corresponding path program 147 times [2021-06-05 22:16:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:34,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883371277] [2021-06-05 22:16:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:34,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:34,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883371277] [2021-06-05 22:16:34,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883371277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:34,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37852207] [2021-06-05 22:16:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:34,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:16:34,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:35,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:35,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:35,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:35,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:35,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:35,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:35,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:35,074 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:35,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:35,076 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37852207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:35,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:35,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:35,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146154358] [2021-06-05 22:16:35,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:35,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:35,116 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:35,223 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 22:16:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:35,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:35,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:35,224 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:16:35,224 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:16:35,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:16:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-06-05 22:16:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 22:16:35,225 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 22:16:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 22:16:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 22:16:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:35,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:35,225 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:35,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3453,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:35,426 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1122920346, now seen corresponding path program 148 times [2021-06-05 22:16:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:35,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900332048] [2021-06-05 22:16:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:35,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900332048] [2021-06-05 22:16:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900332048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629018652] [2021-06-05 22:16:35,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:35,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:35,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:35,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:35,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:35,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:35,686 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:35,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:35,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:35,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629018652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:35,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:35,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:35,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643493982] [2021-06-05 22:16:35,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:35,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:35,712 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:35,791 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-06-05 22:16:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:35,791 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:35,791 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:16:35,792 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:16:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-06-05 22:16:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 22:16:35,793 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 22:16:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:35,793 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 22:16:35,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 22:16:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:35,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:35,793 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:35,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-05 22:16:35,997 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2105487871, now seen corresponding path program 149 times [2021-06-05 22:16:35,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:35,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158709477] [2021-06-05 22:16:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:36,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158709477] [2021-06-05 22:16:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158709477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:36,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243394946] [2021-06-05 22:16:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:36,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:36,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,277 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:36,277 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:36,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:36,278 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:36,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243394946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:36,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:36,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158912667] [2021-06-05 22:16:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:36,323 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:36,495 INFO L93 Difference]: Finished difference Result 100 states and 191 transitions. [2021-06-05 22:16:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:36,496 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:16:36,496 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:16:36,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:16:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 22:16:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 22:16:36,497 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 22:16:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:36,497 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 22:16:36,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 22:16:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:36,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:36,498 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:36,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:36,698 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1936324160, now seen corresponding path program 150 times [2021-06-05 22:16:36,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:36,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158294482] [2021-06-05 22:16:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:36,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158294482] [2021-06-05 22:16:36,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158294482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065347158] [2021-06-05 22:16:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:36,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:36,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:36,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:36,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:36,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:36,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:36,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:36,945 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:16:36,945 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:36,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:36,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065347158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752210889] [2021-06-05 22:16:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:36,993 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:37,173 INFO L93 Difference]: Finished difference Result 128 states and 250 transitions. [2021-06-05 22:16:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:37,174 INFO L225 Difference]: With dead ends: 128 [2021-06-05 22:16:37,174 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 22:16:37,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 22:16:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-06-05 22:16:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 22:16:37,175 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 22:16:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:37,175 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 22:16:37,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 22:16:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:37,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:37,176 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:37,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:37,376 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1488986437, now seen corresponding path program 151 times [2021-06-05 22:16:37,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:37,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734761458] [2021-06-05 22:16:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:37,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734761458] [2021-06-05 22:16:37,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734761458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:37,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367647907] [2021-06-05 22:16:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:37,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:37,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:37,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:37,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:37,631 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:37,631 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:37,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:37,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367647907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138830672] [2021-06-05 22:16:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:37,670 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:37,761 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2021-06-05 22:16:37,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:37,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:37,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:37,761 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:16:37,761 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 22:16:37,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 22:16:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-06-05 22:16:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 22:16:37,762 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 22:16:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:37,763 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 22:16:37,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 22:16:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:37,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:37,763 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:37,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 22:16:37,964 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash -493810808, now seen corresponding path program 152 times [2021-06-05 22:16:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:37,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731945623] [2021-06-05 22:16:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:38,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:38,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731945623] [2021-06-05 22:16:38,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731945623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:38,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301803683] [2021-06-05 22:16:38,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:38,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:38,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:38,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:38,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:38,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:38,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,324 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:16:38,324 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:38,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:38,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:38,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301803683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:38,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:38,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:38,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194758860] [2021-06-05 22:16:38,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:38,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:38,390 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:38,576 INFO L93 Difference]: Finished difference Result 102 states and 203 transitions. [2021-06-05 22:16:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:38,577 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:16:38,577 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 22:16:38,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:16:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 22:16:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-05 22:16:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-06-05 22:16:38,578 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 17 [2021-06-05 22:16:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:38,578 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-06-05 22:16:38,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:38,578 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-06-05 22:16:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:38,578 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:38,578 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:38,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:38,779 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1517742549, now seen corresponding path program 153 times [2021-06-05 22:16:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:38,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333623047] [2021-06-05 22:16:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:38,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333623047] [2021-06-05 22:16:38,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333623047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:38,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38760019] [2021-06-05 22:16:38,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:38,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:38,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:38,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:38,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:38,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:38,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:39,013 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:16:39,013 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:39,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:39,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:16:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:39,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38760019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:39,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:39,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:39,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625659892] [2021-06-05 22:16:39,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:39,059 INFO L87 Difference]: Start difference. First operand 73 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:39,240 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-06-05 22:16:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:39,241 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:16:39,241 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:16:39,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:16:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 22:16:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 22:16:39,242 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 22:16:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:39,242 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 22:16:39,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 22:16:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:39,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:39,242 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:39,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:39,443 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1770897814, now seen corresponding path program 154 times [2021-06-05 22:16:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593270950] [2021-06-05 22:16:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:39,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:39,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593270950] [2021-06-05 22:16:39,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593270950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:39,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354754667] [2021-06-05 22:16:39,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:39,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:39,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:39,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:39,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:39,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:39,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:39,727 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:16:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:39,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:39,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:39,748 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:39,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 22:16:39,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:39,749 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:16:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354754667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:39,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:39,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:39,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691372563] [2021-06-05 22:16:39,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:39,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:39,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:39,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:39,798 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:39,992 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 22:16:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:39,992 INFO L225 Difference]: With dead ends: 119 [2021-06-05 22:16:39,992 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 22:16:39,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 22:16:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 22:16:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 22:16:39,994 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 22:16:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:39,994 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 22:16:39,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 22:16:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:39,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:39,994 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:40,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:40,195 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:40,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:40,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2076731759, now seen corresponding path program 155 times [2021-06-05 22:16:40,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:40,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064953131] [2021-06-05 22:16:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:40,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:40,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064953131] [2021-06-05 22:16:40,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064953131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:40,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529021755] [2021-06-05 22:16:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:40,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:40,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:40,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:40,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:40,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:40,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:40,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:40,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:40,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:40,452 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:16:40,453 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:40,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:40,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:16:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:40,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529021755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:40,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:40,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108185372] [2021-06-05 22:16:40,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:40,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:40,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:40,496 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:40,628 INFO L93 Difference]: Finished difference Result 105 states and 204 transitions. [2021-06-05 22:16:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:40,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:40,629 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:16:40,629 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 22:16:40,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 22:16:40,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2021-06-05 22:16:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 22:16:40,631 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 22:16:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:40,631 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 22:16:40,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 22:16:40,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:40,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:40,631 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:40,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 22:16:40,854 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 93934514, now seen corresponding path program 156 times [2021-06-05 22:16:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:40,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676095196] [2021-06-05 22:16:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:40,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:40,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676095196] [2021-06-05 22:16:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676095196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:40,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054453894] [2021-06-05 22:16:40,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:40,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:40,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:41,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:41,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:41,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:41,154 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:16:41,154 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:41,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:41,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:41,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:41,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 22:16:41,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:41,180 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:16:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:41,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054453894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:41,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:41,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:41,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426689705] [2021-06-05 22:16:41,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:41,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:41,273 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:41,478 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2021-06-05 22:16:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:41,478 INFO L225 Difference]: With dead ends: 118 [2021-06-05 22:16:41,478 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 22:16:41,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 22:16:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-06-05 22:16:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-06-05 22:16:41,481 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 17 [2021-06-05 22:16:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:41,481 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-06-05 22:16:41,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-06-05 22:16:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:41,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:41,481 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:41,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:41,682 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1541501957, now seen corresponding path program 157 times [2021-06-05 22:16:41,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:41,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065918967] [2021-06-05 22:16:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:41,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065918967] [2021-06-05 22:16:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065918967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172846899] [2021-06-05 22:16:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:41,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172846899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:41,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:41,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:41,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416032613] [2021-06-05 22:16:41,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:41,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:41,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:41,905 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:41,999 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-06-05 22:16:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:42,000 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:16:42,000 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:16:42,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:16:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-06-05 22:16:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-06-05 22:16:42,001 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 17 [2021-06-05 22:16:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:42,001 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-06-05 22:16:42,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:42,001 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-06-05 22:16:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:42,001 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:42,001 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:42,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:42,208 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:42,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1169645670, now seen corresponding path program 158 times [2021-06-05 22:16:42,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:42,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006971175] [2021-06-05 22:16:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:42,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:42,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006971175] [2021-06-05 22:16:42,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006971175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:42,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176399245] [2021-06-05 22:16:42,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:42,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:42,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176399245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:42,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:42,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716146221] [2021-06-05 22:16:42,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:42,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:42,456 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:42,588 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2021-06-05 22:16:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:42,589 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:16:42,589 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:16:42,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:16:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-06-05 22:16:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 22:16:42,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 22:16:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:42,591 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 22:16:42,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 22:16:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:42,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:42,591 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:42,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3580,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:42,805 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:42,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613223, now seen corresponding path program 159 times [2021-06-05 22:16:42,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:42,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785583157] [2021-06-05 22:16:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:42,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:42,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785583157] [2021-06-05 22:16:42,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785583157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:42,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686865674] [2021-06-05 22:16:42,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:42,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:43,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:43,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:43,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:43,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:43,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:43,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:43,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:43,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:43,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:43,072 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:43,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686865674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:43,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:43,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:43,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980810027] [2021-06-05 22:16:43,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:43,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:43,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:43,114 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:43,213 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 22:16:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:16:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:43,214 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:16:43,214 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:16:43,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:16:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-06-05 22:16:43,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:16:43,215 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:16:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:43,215 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:16:43,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:16:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:43,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:43,216 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:43,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:43,438 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -195687016, now seen corresponding path program 160 times [2021-06-05 22:16:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:43,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016926735] [2021-06-05 22:16:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:43,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016926735] [2021-06-05 22:16:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016926735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352454735] [2021-06-05 22:16:43,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:43,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:43,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:43,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:43,672 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:43,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:43,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:43,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352454735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:43,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:43,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:43,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263220702] [2021-06-05 22:16:43,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:43,701 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:43,803 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 22:16:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:43,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:43,804 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:16:43,804 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:16:43,804 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:16:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 22:16:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:16:43,805 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:16:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:43,805 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:16:43,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:16:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:43,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:43,806 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:44,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 22:16:44,026 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash -590509219, now seen corresponding path program 161 times [2021-06-05 22:16:44,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:44,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598157742] [2021-06-05 22:16:44,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:44,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:44,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598157742] [2021-06-05 22:16:44,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598157742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:44,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682818264] [2021-06-05 22:16:44,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:44,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:44,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:44,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:44,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:44,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:44,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:44,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:44,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:44,360 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:44,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:44,361 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:44,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682818264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:44,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:44,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299132994] [2021-06-05 22:16:44,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:44,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:44,404 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:44,517 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 22:16:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:16:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:44,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:44,518 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:44,518 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:16:44,518 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:16:44,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 22:16:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:44,519 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:44,519 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:44,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:44,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:44,519 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:44,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:44,720 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:44,720 INFO L82 PathProgramCache]: Analyzing trace with hash 151612158, now seen corresponding path program 162 times [2021-06-05 22:16:44,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:44,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410454026] [2021-06-05 22:16:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:44,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:44,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410454026] [2021-06-05 22:16:44,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410454026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:44,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39780455] [2021-06-05 22:16:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:44,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:44,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:44,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:44,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:44,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:44,948 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:44,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:44,949 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:44,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39780455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:44,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:44,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220522831] [2021-06-05 22:16:44,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:44,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:44,975 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:45,106 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-06-05 22:16:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:45,106 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:16:45,106 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 22:16:45,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 22:16:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 22:16:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:45,108 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:45,108 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:45,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:45,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:45,108 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:45,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:45,309 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash -830955367, now seen corresponding path program 163 times [2021-06-05 22:16:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421765191] [2021-06-05 22:16:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:45,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421765191] [2021-06-05 22:16:45,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421765191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:45,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045683802] [2021-06-05 22:16:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:45,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:45,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:45,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:45,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:45,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:45,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:45,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:45,582 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:45,582 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:45,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:45,583 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:45,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045683802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:45,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:45,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:45,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135394060] [2021-06-05 22:16:45,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:45,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:45,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:45,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:45,631 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:45,797 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 22:16:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:45,797 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:16:45,797 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 22:16:45,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 22:16:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 22:16:45,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:45,798 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:45,799 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:45,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:45,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:45,799 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:45,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:45,999 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1084110632, now seen corresponding path program 164 times [2021-06-05 22:16:46,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:46,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349469538] [2021-06-05 22:16:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:46,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349469538] [2021-06-05 22:16:46,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349469538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566020763] [2021-06-05 22:16:46,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:46,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:46,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:46,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:46,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:46,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:46,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:46,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:46,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:46,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:46,286 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:16:46,286 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:46,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:46,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566020763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:46,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:46,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:46,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020646016] [2021-06-05 22:16:46,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:46,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:46,335 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:46,555 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 22:16:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:46,556 INFO L225 Difference]: With dead ends: 119 [2021-06-05 22:16:46,556 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 22:16:46,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:16:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 22:16:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-06-05 22:16:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:46,557 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:46,557 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:46,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:46,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:46,557 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:46,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:46,758 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:46,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1531448355, now seen corresponding path program 165 times [2021-06-05 22:16:46,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:46,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011236131] [2021-06-05 22:16:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:46,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:46,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011236131] [2021-06-05 22:16:46,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011236131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:46,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043402628] [2021-06-05 22:16:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:46,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:46,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:46,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:46,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:46,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:46,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:47,025 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:47,025 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:47,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:47,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:47,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043402628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:47,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:47,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:47,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232862216] [2021-06-05 22:16:47,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:47,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:47,069 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:47,188 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 22:16:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:47,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:47,189 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:47,189 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:16:47,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:16:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:16:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:16:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:16:47,190 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:16:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:47,190 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:16:47,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:16:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:47,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:47,191 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:47,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 22:16:47,391 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash 780721696, now seen corresponding path program 166 times [2021-06-05 22:16:47,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:47,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759018447] [2021-06-05 22:16:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:47,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:47,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759018447] [2021-06-05 22:16:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759018447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:47,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635649624] [2021-06-05 22:16:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:47,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:47,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:47,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:47,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:47,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:47,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:47,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:47,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:47,643 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:16:47,643 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:47,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:47,644 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635649624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:47,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:47,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:16:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283986484] [2021-06-05 22:16:47,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:16:47,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:16:47,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:47,706 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:47,951 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 22:16:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:47,952 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:16:47,952 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:16:47,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 339.9ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:16:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:16:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-06-05 22:16:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 22:16:47,953 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 22:16:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:47,953 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 22:16:47,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 22:16:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:47,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:47,953 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:48,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:48,154 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 449726579, now seen corresponding path program 167 times [2021-06-05 22:16:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588595641] [2021-06-05 22:16:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:48,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588595641] [2021-06-05 22:16:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588595641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:48,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050619671] [2021-06-05 22:16:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:48,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:48,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:48,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:48,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:48,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:48,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:48,478 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:48,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:48,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:48,513 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:48,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:48,515 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:48,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050619671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:48,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:48,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2989738] [2021-06-05 22:16:48,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:48,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:48,564 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:48,661 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 22:16:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:16:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:48,661 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:48,661 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:16:48,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:16:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 22:16:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:48,663 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:48,663 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:48,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:48,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:48,663 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:48,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3667 [2021-06-05 22:16:48,882 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1191847956, now seen corresponding path program 168 times [2021-06-05 22:16:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:48,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984088508] [2021-06-05 22:16:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:49,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:49,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984088508] [2021-06-05 22:16:49,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984088508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:49,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896662468] [2021-06-05 22:16:49,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:49,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:49,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:49,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:49,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:49,123 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:49,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:49,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896662468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:49,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:49,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:49,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393532026] [2021-06-05 22:16:49,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:49,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:49,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:49,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:49,149 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:49,232 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 22:16:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:49,233 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:16:49,233 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:16:49,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:16:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 22:16:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:49,234 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:49,234 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:49,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:49,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:49,235 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:49,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:49,435 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 209280431, now seen corresponding path program 169 times [2021-06-05 22:16:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:49,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466316958] [2021-06-05 22:16:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:49,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:49,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466316958] [2021-06-05 22:16:49,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466316958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:49,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834997894] [2021-06-05 22:16:49,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:49,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:49,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:49,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:49,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:49,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:49,695 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:49,695 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:49,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:49,696 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:49,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834997894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:49,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:49,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585429363] [2021-06-05 22:16:49,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:49,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:49,742 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:49,901 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 22:16:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:49,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:49,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:49,902 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:16:49,902 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 22:16:49,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 22:16:49,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 22:16:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:49,903 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:49,903 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:49,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:49,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:49,904 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:50,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:50,104 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -43874834, now seen corresponding path program 170 times [2021-06-05 22:16:50,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:50,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145563940] [2021-06-05 22:16:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145563940] [2021-06-05 22:16:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145563940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069545854] [2021-06-05 22:16:50,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:50,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:50,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:50,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:50,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:50,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:50,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:50,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:50,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:50,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:50,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:50,372 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:16:50,372 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:50,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:50,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:50,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069545854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:50,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:50,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507419043] [2021-06-05 22:16:50,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:50,413 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:50,571 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-06-05 22:16:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:50,571 INFO L225 Difference]: With dead ends: 120 [2021-06-05 22:16:50,571 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 22:16:50,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 217.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 22:16:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-06-05 22:16:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:50,573 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:50,573 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:50,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:50,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:50,573 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:50,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:50,788 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash -491212557, now seen corresponding path program 171 times [2021-06-05 22:16:50,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:50,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870623882] [2021-06-05 22:16:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:50,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:50,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870623882] [2021-06-05 22:16:50,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870623882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:50,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360973956] [2021-06-05 22:16:50,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:50,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:51,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:51,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,048 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:51,048 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:51,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:51,049 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:51,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360973956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:51,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:51,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933590139] [2021-06-05 22:16:51,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:51,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:51,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:51,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:51,087 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:51,189 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 22:16:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:51,189 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:51,189 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:16:51,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:16:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:16:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:16:51,192 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:16:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:51,192 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:16:51,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:16:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:51,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:51,193 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:51,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3706 [2021-06-05 22:16:51,409 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1820957494, now seen corresponding path program 172 times [2021-06-05 22:16:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243334487] [2021-06-05 22:16:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:51,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:51,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243334487] [2021-06-05 22:16:51,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243334487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:51,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108500615] [2021-06-05 22:16:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:51,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:51,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:51,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:51,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:51,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:51,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:51,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:51,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:51,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:51,686 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:16:51,686 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:51,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:51,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108500615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:51,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:51,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:51,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591168736] [2021-06-05 22:16:51,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:51,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:51,759 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:52,013 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 22:16:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:52,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:52,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:52,014 INFO L225 Difference]: With dead ends: 97 [2021-06-05 22:16:52,014 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 22:16:52,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:52,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 22:16:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-06-05 22:16:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:16:52,015 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:16:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:52,015 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:16:52,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:16:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:52,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:52,016 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:52,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3722 [2021-06-05 22:16:52,216 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 797025753, now seen corresponding path program 173 times [2021-06-05 22:16:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:52,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8152906] [2021-06-05 22:16:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:52,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8152906] [2021-06-05 22:16:52,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8152906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:52,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233516522] [2021-06-05 22:16:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:52,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:52,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:52,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:52,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:52,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:52,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:52,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:52,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:52,467 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:16:52,467 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:52,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:52,468 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:16:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:52,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233516522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:52,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:52,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:52,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050842121] [2021-06-05 22:16:52,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:52,515 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:52,709 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 22:16:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:16:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:52,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:52,709 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:16:52,710 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:16:52,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:16:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:16:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:16:52,711 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:16:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:52,711 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:16:52,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:16:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:52,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:52,711 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:52,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3735,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:52,912 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 543870488, now seen corresponding path program 174 times [2021-06-05 22:16:52,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:52,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789918022] [2021-06-05 22:16:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:53,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:53,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789918022] [2021-06-05 22:16:53,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789918022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:53,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424549884] [2021-06-05 22:16:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:53,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:16:53,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:53,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:53,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:53,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:53,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,195 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:16:53,195 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:53,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:53,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:53,213 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 22:16:53,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:53,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:16:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424549884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:53,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:53,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92662983] [2021-06-05 22:16:53,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:53,267 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:53,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:53,426 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 22:16:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:53,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:53,427 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:16:53,427 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 22:16:53,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 22:16:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-06-05 22:16:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:16:53,428 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:16:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:53,428 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:16:53,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:16:53,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:53,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:53,429 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:53,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-06-05 22:16:53,629 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash 96532765, now seen corresponding path program 175 times [2021-06-05 22:16:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:53,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702451406] [2021-06-05 22:16:53,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:53,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702451406] [2021-06-05 22:16:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702451406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048944807] [2021-06-05 22:16:53,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:53,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:53,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:53,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:53,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:53,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:53,868 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:16:53,868 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:53,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:53,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:16:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:53,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048944807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:53,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:53,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988398376] [2021-06-05 22:16:53,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:53,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:53,907 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:54,016 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 22:16:54,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:54,017 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:16:54,017 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 22:16:54,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:54,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 22:16:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 22:16:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:16:54,018 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:16:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:54,018 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:16:54,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:16:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:54,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:54,018 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:54,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:54,219 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1886264480, now seen corresponding path program 176 times [2021-06-05 22:16:54,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:54,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523146856] [2021-06-05 22:16:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:54,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:54,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523146856] [2021-06-05 22:16:54,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523146856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:54,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729029123] [2021-06-05 22:16:54,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:54,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:54,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:54,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,493 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:54,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,538 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:16:54,539 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:54,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:54,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:54,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:54,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-06-05 22:16:54,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:54,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:16:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:54,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729029123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:54,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:54,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:54,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858576375] [2021-06-05 22:16:54,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:54,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:54,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:54,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:54,646 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:54,841 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 22:16:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:16:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:54,842 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:16:54,842 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 22:16:54,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:16:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 22:16:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2021-06-05 22:16:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 22:16:54,843 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 22:16:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:54,843 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 22:16:54,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 22:16:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:54,844 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:54,844 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:55,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-06-05 22:16:55,066 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash -438697037, now seen corresponding path program 177 times [2021-06-05 22:16:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:55,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909960684] [2021-06-05 22:16:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:55,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:55,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909960684] [2021-06-05 22:16:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909960684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:55,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442822037] [2021-06-05 22:16:55,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:55,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:16:55,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442822037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:55,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:55,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:55,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239985536] [2021-06-05 22:16:55,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:55,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:55,295 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:55,400 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 22:16:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:55,401 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:16:55,401 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:16:55,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:16:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 22:16:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:16:55,402 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:16:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:55,402 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:16:55,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:16:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:55,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:55,403 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:55,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3790 [2021-06-05 22:16:55,603 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:55,604 INFO L82 PathProgramCache]: Analyzing trace with hash -810553324, now seen corresponding path program 178 times [2021-06-05 22:16:55,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:55,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699137597] [2021-06-05 22:16:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:55,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699137597] [2021-06-05 22:16:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699137597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359673192] [2021-06-05 22:16:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:55,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:55,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:55,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:55,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359673192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:55,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:55,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:55,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932922836] [2021-06-05 22:16:55,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:55,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:55,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:55,857 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:55,975 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 22:16:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:55,975 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:16:55,975 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:16:55,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:16:55,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-06-05 22:16:55,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 22:16:55,976 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 22:16:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:55,977 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 22:16:55,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 22:16:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:55,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:55,977 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:56,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 22:16:56,177 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1662702051, now seen corresponding path program 179 times [2021-06-05 22:16:56,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:56,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138553423] [2021-06-05 22:16:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:56,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138553423] [2021-06-05 22:16:56,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138553423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:56,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588763778] [2021-06-05 22:16:56,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:56,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:16:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:56,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:56,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:16:56,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:56,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,439 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:56,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:56,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:16:56,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:56,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:56,473 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:56,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:16:56,474 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:16:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588763778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:56,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:56,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:56,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916738040] [2021-06-05 22:16:56,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:56,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:56,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:56,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:56,516 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:56,602 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 22:16:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:16:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:56,603 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:56,603 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:16:56,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:16:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 22:16:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:56,604 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:56,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:56,604 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:56,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3799 [2021-06-05 22:16:56,805 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash -920580674, now seen corresponding path program 180 times [2021-06-05 22:16:56,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:56,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960679226] [2021-06-05 22:16:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:56,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960679226] [2021-06-05 22:16:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960679226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784623606] [2021-06-05 22:16:56,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:56,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:16:56,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:56,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:56,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:16:57,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:57,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:16:57,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:57,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:16:57,029 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:57,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:16:57,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:16:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:57,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784623606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:57,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:57,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:16:57,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634366460] [2021-06-05 22:16:57,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:16:57,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:57,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:16:57,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:16:57,054 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:57,138 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 22:16:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:57,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:57,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:57,138 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:16:57,138 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:16:57,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:57,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:16:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 22:16:57,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:16:57,139 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:16:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:57,139 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:16:57,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:16:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:57,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:57,140 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-06-05 22:16:57,340 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1903148199, now seen corresponding path program 181 times [2021-06-05 22:16:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188285955] [2021-06-05 22:16:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:57,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188285955] [2021-06-05 22:16:57,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188285955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:57,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340141181] [2021-06-05 22:16:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:57,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:57,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:57,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:57,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:57,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:57,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:57,602 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:57,603 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:57,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:57,604 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:57,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340141181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:57,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:57,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207482822] [2021-06-05 22:16:57,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:57,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:57,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:57,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:57,649 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:57,806 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 22:16:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:16:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:57,807 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:16:57,807 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 22:16:57,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:57,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 22:16:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 22:16:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:57,808 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:57,808 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:57,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:57,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:57,809 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:58,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-05 22:16:58,009 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2138663832, now seen corresponding path program 182 times [2021-06-05 22:16:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:58,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551831409] [2021-06-05 22:16:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:58,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551831409] [2021-06-05 22:16:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551831409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615905898] [2021-06-05 22:16:58,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:58,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:16:58,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:58,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:58,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:16:58,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:58,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,247 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:16:58,247 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:58,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:58,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615905898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560815873] [2021-06-05 22:16:58,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:58,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:58,287 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:58,443 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-06-05 22:16:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:16:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:58,444 INFO L225 Difference]: With dead ends: 121 [2021-06-05 22:16:58,444 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 22:16:58,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:16:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 22:16:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2021-06-05 22:16:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 22:16:58,445 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 22:16:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:58,445 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 22:16:58,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 22:16:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:58,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:58,445 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:58,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-06-05 22:16:58,646 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:58,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:58,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1691326109, now seen corresponding path program 183 times [2021-06-05 22:16:58,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:58,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747290899] [2021-06-05 22:16:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:58,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:58,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747290899] [2021-06-05 22:16:58,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747290899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:58,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699759797] [2021-06-05 22:16:58,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:16:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:58,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:58,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:58,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:58,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:58,906 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:16:58,906 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:58,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:58,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:16:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:58,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699759797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:58,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:58,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:58,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37804954] [2021-06-05 22:16:58,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:58,944 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:59,040 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 22:16:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:16:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:59,041 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:16:59,041 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:16:59,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:16:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:16:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:16:59,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:16:59,042 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:16:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:59,042 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:16:59,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:16:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:59,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:59,042 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:59,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:59,243 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash -291471136, now seen corresponding path program 184 times [2021-06-05 22:16:59,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:59,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259313722] [2021-06-05 22:16:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:16:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:59,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:16:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259313722] [2021-06-05 22:16:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259313722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724117578] [2021-06-05 22:16:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:16:59,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:16:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:16:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:16:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:16:59,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:16:59,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:16:59,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:16:59,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:16:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:16:59,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:16:59,477 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:16:59,477 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:16:59,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:16:59,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:16:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:16:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724117578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:16:59,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:16:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:16:59,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550078611] [2021-06-05 22:16:59,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:16:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:16:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:16:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:16:59,539 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:16:59,736 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 22:16:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:16:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:16:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:16:59,736 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:16:59,736 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 22:16:59,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:16:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 22:16:59,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-06-05 22:16:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:16:59,738 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:16:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:16:59,738 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:16:59,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:16:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:16:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:16:59,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:16:59,739 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:16:59,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3855 [2021-06-05 22:16:59,958 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:16:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:16:59,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1315402877, now seen corresponding path program 185 times [2021-06-05 22:16:59,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:16:59,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337009684] [2021-06-05 22:16:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:16:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:00,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:00,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337009684] [2021-06-05 22:17:00,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337009684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:00,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668433268] [2021-06-05 22:17:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:00,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:00,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:00,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:00,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:00,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:00,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:00,199 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:00,199 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:00,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:00,200 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:00,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668433268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:00,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:00,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131981163] [2021-06-05 22:17:00,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:00,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:00,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:00,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:00,244 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:00,415 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 22:17:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:00,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:00,415 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:17:00,415 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:00,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:17:00,416 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:17:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:00,417 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:17:00,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:17:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:00,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:00,417 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:00,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3868,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:00,617 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1568558142, now seen corresponding path program 186 times [2021-06-05 22:17:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:00,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329648196] [2021-06-05 22:17:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:00,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329648196] [2021-06-05 22:17:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329648196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:00,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208350479] [2021-06-05 22:17:00,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:00,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:00,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:00,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:00,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:00,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:00,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:00,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:00,952 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:17:00,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:00,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:00,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:00,970 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:00,970 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 22:17:00,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:00,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208350479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:01,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:01,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:01,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012165035] [2021-06-05 22:17:01,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:01,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:01,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:01,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:01,020 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:01,190 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-06-05 22:17:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:01,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:01,191 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:01,191 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:01,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-06-05 22:17:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:17:01,192 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:17:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:01,193 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:17:01,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:17:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:01,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:01,193 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:01,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3878 [2021-06-05 22:17:01,409 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2015895865, now seen corresponding path program 187 times [2021-06-05 22:17:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:01,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943563031] [2021-06-05 22:17:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:01,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943563031] [2021-06-05 22:17:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943563031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221532154] [2021-06-05 22:17:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:01,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:01,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:01,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:01,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:01,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:01,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:01,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:01,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:01,646 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:01,646 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:01,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:01,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221532154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:01,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:01,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:01,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416872217] [2021-06-05 22:17:01,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:01,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:01,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:01,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:01,685 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:01,781 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 22:17:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:01,781 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:17:01,781 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 22:17:01,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 22:17:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 22:17:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:17:01,782 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:17:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:01,783 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:17:01,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:17:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:01,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:01,783 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:01,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:01,983 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:01,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:01,984 INFO L82 PathProgramCache]: Analyzing trace with hash 296274186, now seen corresponding path program 188 times [2021-06-05 22:17:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:01,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753165828] [2021-06-05 22:17:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:02,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:02,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753165828] [2021-06-05 22:17:02,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753165828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:02,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667874335] [2021-06-05 22:17:02,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:02,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:02,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:02,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:02,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:02,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:02,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:02,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:02,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:02,259 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:17:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:02,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:02,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:02,277 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:02,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_110 vanished before elimination [2021-06-05 22:17:02,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:02,278 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:02,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667874335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:02,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:02,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:02,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118140697] [2021-06-05 22:17:02,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:02,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:02,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:02,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:02,349 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:02,533 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2021-06-05 22:17:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:02,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:02,533 INFO L225 Difference]: With dead ends: 114 [2021-06-05 22:17:02,533 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:02,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-06-05 22:17:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 22:17:02,535 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 22:17:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:02,535 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 22:17:02,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 22:17:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:02,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:02,535 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:02,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:02,736 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1743841629, now seen corresponding path program 189 times [2021-06-05 22:17:02,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:02,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605540675] [2021-06-05 22:17:02,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:02,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605540675] [2021-06-05 22:17:02,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605540675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:02,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565439743] [2021-06-05 22:17:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:02,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:02,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:02,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565439743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:02,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:02,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:02,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188098571] [2021-06-05 22:17:02,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:02,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:02,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:02,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:02,978 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:03,080 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 22:17:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:03,080 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:17:03,080 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:17:03,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:17:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 22:17:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:03,081 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:03,081 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:03,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:03,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:03,082 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:03,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 22:17:03,282 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1371985342, now seen corresponding path program 190 times [2021-06-05 22:17:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:03,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439026241] [2021-06-05 22:17:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:03,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439026241] [2021-06-05 22:17:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439026241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023337508] [2021-06-05 22:17:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:03,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:03,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:03,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023337508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:03,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:03,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:03,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926442794] [2021-06-05 22:17:03,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:03,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:03,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:03,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:03,553 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:03,701 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 22:17:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:03,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:03,701 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:17:03,701 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:17:03,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:03,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:17:03,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-06-05 22:17:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 22:17:03,703 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 22:17:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:03,703 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 22:17:03,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 22:17:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:03,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:03,703 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:03,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:03,904 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:03,904 INFO L82 PathProgramCache]: Analyzing trace with hash -275167079, now seen corresponding path program 191 times [2021-06-05 22:17:03,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:03,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146098700] [2021-06-05 22:17:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:04,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:04,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146098700] [2021-06-05 22:17:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146098700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:04,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921707376] [2021-06-05 22:17:04,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:04,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:04,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:04,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:04,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:04,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:04,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:04,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:04,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:04,256 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:04,257 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:04,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:04,258 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:04,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921707376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:04,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:04,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:04,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84730195] [2021-06-05 22:17:04,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:04,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:04,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:04,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:04,304 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:04,535 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 22:17:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:04,535 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:04,535 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 22:17:04,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 22:17:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 22:17:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:04,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 22:17:04,536 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 22:17:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:04,537 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 22:17:04,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 22:17:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:04,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:04,537 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:04,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3920 [2021-06-05 22:17:04,737 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -528322344, now seen corresponding path program 192 times [2021-06-05 22:17:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:04,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41088435] [2021-06-05 22:17:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:04,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41088435] [2021-06-05 22:17:04,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41088435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:04,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942886255] [2021-06-05 22:17:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:04,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:04,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:05,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:05,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:05,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:05,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:05,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,115 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 22:17:05,115 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:05,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:05,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 22:17:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942886255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:05,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:05,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009816190] [2021-06-05 22:17:05,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:05,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:05,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:05,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:05,168 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:05,374 INFO L93 Difference]: Finished difference Result 115 states and 227 transitions. [2021-06-05 22:17:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:05,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:05,375 INFO L225 Difference]: With dead ends: 115 [2021-06-05 22:17:05,375 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 22:17:05,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:05,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 22:17:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2021-06-05 22:17:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 22:17:05,376 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 22:17:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:05,376 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 22:17:05,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 22:17:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:05,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:05,376 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:05,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:05,577 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash -975660067, now seen corresponding path program 193 times [2021-06-05 22:17:05,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:05,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899731686] [2021-06-05 22:17:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:05,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899731686] [2021-06-05 22:17:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899731686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981604274] [2021-06-05 22:17:05,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:05,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:05,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:05,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:05,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:05,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:05,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:05,876 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:05,876 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:05,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:05,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981604274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:05,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:05,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:05,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189189070] [2021-06-05 22:17:05,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:05,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:05,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:05,916 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:06,008 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 22:17:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:06,009 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:06,009 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:06,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:06,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 22:17:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 22:17:06,010 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 22:17:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:06,010 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 22:17:06,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 22:17:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:06,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:06,011 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:06,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3951 [2021-06-05 22:17:06,211 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1336509984, now seen corresponding path program 194 times [2021-06-05 22:17:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:06,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439709403] [2021-06-05 22:17:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:06,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439709403] [2021-06-05 22:17:06,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439709403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:06,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031292561] [2021-06-05 22:17:06,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:06,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:06,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:06,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:06,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:06,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:06,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:06,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:06,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:06,572 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 22:17:06,572 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:06,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:06,573 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 22:17:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031292561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:06,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:06,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:06,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572010231] [2021-06-05 22:17:06,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:06,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:06,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:06,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:06,651 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:06,974 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-06-05 22:17:06,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:06,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:06,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:06,975 INFO L225 Difference]: With dead ends: 117 [2021-06-05 22:17:06,975 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 22:17:06,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 22:17:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-06-05 22:17:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 22:17:06,976 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 22:17:06,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:06,976 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 22:17:06,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 22:17:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:06,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:06,977 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:07,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:07,177 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1510889869, now seen corresponding path program 195 times [2021-06-05 22:17:07,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:07,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337756507] [2021-06-05 22:17:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:07,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337756507] [2021-06-05 22:17:07,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337756507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:07,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024360802] [2021-06-05 22:17:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:07,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:07,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:07,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024360802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:07,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:07,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:07,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139161704] [2021-06-05 22:17:07,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:07,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:07,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:07,432 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:07,551 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2021-06-05 22:17:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:07,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:07,551 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:17:07,551 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:07,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 22:17:07,552 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 22:17:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:07,552 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 22:17:07,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 22:17:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:07,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:07,553 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:07,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:07,753 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1882746156, now seen corresponding path program 196 times [2021-06-05 22:17:07,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:07,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797836456] [2021-06-05 22:17:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:07,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797836456] [2021-06-05 22:17:07,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797836456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547759233] [2021-06-05 22:17:07,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:07,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:07,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:07,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:08,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547759233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:08,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:08,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:08,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545177823] [2021-06-05 22:17:08,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:08,075 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:08,240 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 22:17:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:08,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:08,240 INFO L225 Difference]: With dead ends: 96 [2021-06-05 22:17:08,240 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:17:08,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:08,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:17:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 22:17:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-06-05 22:17:08,241 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-06-05 22:17:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:08,241 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-06-05 22:17:08,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-06-05 22:17:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:08,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:08,242 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:08,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3986 [2021-06-05 22:17:08,442 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:08,442 INFO L82 PathProgramCache]: Analyzing trace with hash -923144547, now seen corresponding path program 197 times [2021-06-05 22:17:08,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:08,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635784666] [2021-06-05 22:17:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:08,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635784666] [2021-06-05 22:17:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635784666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076941878] [2021-06-05 22:17:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:08,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:08,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:08,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:08,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:08,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076941878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:08,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:08,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:08,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234687164] [2021-06-05 22:17:08,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:08,655 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:08,746 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 22:17:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:08,747 INFO L225 Difference]: With dead ends: 97 [2021-06-05 22:17:08,747 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:17:08,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:17:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2021-06-05 22:17:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-06-05 22:17:08,748 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 17 [2021-06-05 22:17:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:08,748 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-06-05 22:17:08,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-06-05 22:17:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:08,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:08,749 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:08,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:08,949 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1399528608, now seen corresponding path program 198 times [2021-06-05 22:17:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:08,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308548465] [2021-06-05 22:17:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:09,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:09,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308548465] [2021-06-05 22:17:09,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308548465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326975454] [2021-06-05 22:17:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:09,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:09,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:09,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326975454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:09,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941385967] [2021-06-05 22:17:09,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:09,215 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:09,344 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 22:17:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:09,345 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:17:09,345 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 22:17:09,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 22:17:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 22:17:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:09,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:09,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:09,346 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:09,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:09,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:09,346 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:09,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:09,547 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:09,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:09,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1296800747, now seen corresponding path program 199 times [2021-06-05 22:17:09,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:09,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934454040] [2021-06-05 22:17:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:09,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:09,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934454040] [2021-06-05 22:17:09,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934454040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979206825] [2021-06-05 22:17:09,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:09,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:17:09,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:09,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:09,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:09,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:09,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:09,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:09,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:09,867 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:09,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:09,868 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:17:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:09,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979206825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:09,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:09,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903399997] [2021-06-05 22:17:09,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:09,915 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:10,039 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2021-06-05 22:17:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:10,039 INFO L225 Difference]: With dead ends: 91 [2021-06-05 22:17:10,040 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 22:17:10,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 22:17:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-06-05 22:17:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:17:10,041 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:17:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:10,041 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:17:10,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:17:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:10,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:10,042 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:10,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-05 22:17:10,265 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1467240342, now seen corresponding path program 200 times [2021-06-05 22:17:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:10,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614169262] [2021-06-05 22:17:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:10,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614169262] [2021-06-05 22:17:10,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614169262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:10,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914868525] [2021-06-05 22:17:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:17:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:10,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:17:10,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:10,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:10,457 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:10,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:17:10,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:17:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914868525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672785808] [2021-06-05 22:17:10,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:10,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:10,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:10,481 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:10,553 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 22:17:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:10,554 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:17:10,554 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:17:10,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:17:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 22:17:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:17:10,555 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:17:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:10,555 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:17:10,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:10,555 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:17:10,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:10,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:10,555 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:10,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-05 22:17:10,756 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:10,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1862062545, now seen corresponding path program 201 times [2021-06-05 22:17:10,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:10,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261663579] [2021-06-05 22:17:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:10,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261663579] [2021-06-05 22:17:10,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261663579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:10,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560678959] [2021-06-05 22:17:10,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:10,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:17:10,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:10,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:11,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:11,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:17:11,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:11,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:11,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:11,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:11,029 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:11,056 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:11,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:11,057 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:17:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560678959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:11,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:11,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:11,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596466022] [2021-06-05 22:17:11,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:11,098 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:11,227 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 22:17:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:11,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:11,227 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:17:11,227 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 22:17:11,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 22:17:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-06-05 22:17:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:11,228 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:11,228 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:11,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:11,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:11,229 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:11,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4013,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:11,429 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:11,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1119941168, now seen corresponding path program 202 times [2021-06-05 22:17:11,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:11,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256151179] [2021-06-05 22:17:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:11,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256151179] [2021-06-05 22:17:11,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256151179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173651212] [2021-06-05 22:17:11,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:11,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:11,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:11,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:17:11,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:17:11,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:11,646 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:11,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:17:11,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:17:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:11,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173651212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:11,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:11,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:11,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155060529] [2021-06-05 22:17:11,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:11,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:11,672 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:11,782 INFO L93 Difference]: Finished difference Result 103 states and 207 transitions. [2021-06-05 22:17:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:11,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:11,782 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:17:11,782 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:17:11,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:17:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-06-05 22:17:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:11,783 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:11,783 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:11,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:11,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:11,784 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:11,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 22:17:11,984 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2102508693, now seen corresponding path program 203 times [2021-06-05 22:17:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41095083] [2021-06-05 22:17:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:12,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:12,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41095083] [2021-06-05 22:17:12,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41095083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:12,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209324622] [2021-06-05 22:17:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:12,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:12,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:12,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:12,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:12,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,281 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:12,281 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:12,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:12,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:12,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209324622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235940884] [2021-06-05 22:17:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:12,329 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:12,510 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 22:17:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:12,511 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:17:12,511 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:12,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:12,512 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:12,512 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:12,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:12,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:12,513 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:12,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:12,713 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:12,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1939303338, now seen corresponding path program 204 times [2021-06-05 22:17:12,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:12,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498596821] [2021-06-05 22:17:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:12,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:12,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498596821] [2021-06-05 22:17:12,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498596821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:12,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549067064] [2021-06-05 22:17:12,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:12,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:12,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:12,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:12,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:12,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:12,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:12,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:12,965 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:12,966 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:12,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:12,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549067064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:13,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:13,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:13,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018561860] [2021-06-05 22:17:13,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:13,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:13,007 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:13,117 INFO L93 Difference]: Finished difference Result 117 states and 229 transitions. [2021-06-05 22:17:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:13,117 INFO L225 Difference]: With dead ends: 117 [2021-06-05 22:17:13,118 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 22:17:13,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 22:17:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2021-06-05 22:17:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:13,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:13,119 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:13,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,119 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:13,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:13,119 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:13,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 22:17:13,320 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1491965615, now seen corresponding path program 205 times [2021-06-05 22:17:13,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:13,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835710233] [2021-06-05 22:17:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:13,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:13,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835710233] [2021-06-05 22:17:13,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835710233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:13,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054514035] [2021-06-05 22:17:13,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:13,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:13,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:13,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:13,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:13,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:13,590 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:13,590 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:13,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:13,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:13,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054514035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:13,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:13,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:13,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993171606] [2021-06-05 22:17:13,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:13,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:13,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:13,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:13,629 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:13,806 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 22:17:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:13,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:13,807 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:17:13,807 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:17:13,807 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:17:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 22:17:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 22:17:13,808 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 22:17:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:13,808 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 22:17:13,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 22:17:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:13,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:13,808 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:14,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 22:17:14,009 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash -490831630, now seen corresponding path program 206 times [2021-06-05 22:17:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:14,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961434478] [2021-06-05 22:17:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:14,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961434478] [2021-06-05 22:17:14,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961434478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:14,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123717795] [2021-06-05 22:17:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:14,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:14,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:14,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:14,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:14,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:14,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,275 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:14,275 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:14,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:14,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123717795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:14,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:14,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806478508] [2021-06-05 22:17:14,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:14,338 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:14,523 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 22:17:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:14,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:14,524 INFO L225 Difference]: With dead ends: 94 [2021-06-05 22:17:14,524 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:17:14,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:17:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 22:17:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:17:14,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:17:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:14,525 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:17:14,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:17:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:14,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:14,525 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:14,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:14,726 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash -821826747, now seen corresponding path program 207 times [2021-06-05 22:17:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:14,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688988996] [2021-06-05 22:17:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:14,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:14,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688988996] [2021-06-05 22:17:14,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688988996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:14,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104940079] [2021-06-05 22:17:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:14,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:17:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:17:14,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:14,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:14,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:14,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:14,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:14,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:14,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:15,011 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:15,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:15,012 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:17:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104940079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:15,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:15,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:15,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754832344] [2021-06-05 22:17:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:15,052 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:15,134 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 22:17:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:15,135 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:17:15,135 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:17:15,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:17:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 22:17:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:15,136 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:15,136 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:15,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:15,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:15,137 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:15,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,337 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash -79705370, now seen corresponding path program 208 times [2021-06-05 22:17:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:15,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496290596] [2021-06-05 22:17:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:15,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:15,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496290596] [2021-06-05 22:17:15,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496290596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:15,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83577580] [2021-06-05 22:17:15,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:15,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:17:15,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:17:15,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:15,552 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:15,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:17:15,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:17:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:15,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83577580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:15,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:15,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:15,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864778225] [2021-06-05 22:17:15,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:15,582 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:15,667 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 22:17:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:15,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:15,667 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:17:15,667 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:17:15,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:17:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:17:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:15,668 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:15,669 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:15,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:15,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:15,669 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:15,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,869 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:15,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1062272895, now seen corresponding path program 209 times [2021-06-05 22:17:15,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:15,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46173080] [2021-06-05 22:17:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:15,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46173080] [2021-06-05 22:17:15,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46173080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:15,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556974077] [2021-06-05 22:17:15,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:15,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:16,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:16,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:16,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,121 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:16,121 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:16,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:16,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:16,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556974077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:16,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882255795] [2021-06-05 22:17:16,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:16,167 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:16,349 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 22:17:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:16,349 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:17:16,349 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:16,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:16,351 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:16,351 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:16,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:16,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:16,351 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:16,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:16,552 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1315428160, now seen corresponding path program 210 times [2021-06-05 22:17:16,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:16,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871868917] [2021-06-05 22:17:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:16,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871868917] [2021-06-05 22:17:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871868917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456312965] [2021-06-05 22:17:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:16,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:16,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:16,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:16,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:16,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:16,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:16,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:16,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:16,788 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:16,789 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:16,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:16,790 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:16,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456312965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:16,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:16,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:16,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471446680] [2021-06-05 22:17:16,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:16,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:16,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:16,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:16,828 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:16,931 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 22:17:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:16,931 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:17:16,931 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:17:16,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:17:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 22:17:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:16,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:16,933 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:16,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:16,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:16,933 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:17,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-05 22:17:17,133 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1762765883, now seen corresponding path program 211 times [2021-06-05 22:17:17,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:17,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117821617] [2021-06-05 22:17:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:17,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:17,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117821617] [2021-06-05 22:17:17,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117821617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:17,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12905840] [2021-06-05 22:17:17,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:17,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:17,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:17,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:17,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:17,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:17,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:17,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:17,388 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:17,388 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:17,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:17,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:17,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12905840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:17,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:17,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:17,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660577178] [2021-06-05 22:17:17,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:17,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:17,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:17,426 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:17,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:17,601 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 22:17:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:17,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:17,601 INFO L225 Difference]: With dead ends: 92 [2021-06-05 22:17:17,601 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 22:17:17,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 22:17:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 22:17:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 22:17:17,603 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 22:17:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:17,603 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 22:17:17,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 22:17:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:17,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:17,603 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:17,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-05 22:17:17,804 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash 549404168, now seen corresponding path program 212 times [2021-06-05 22:17:17,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:17,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365550164] [2021-06-05 22:17:17,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:17,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365550164] [2021-06-05 22:17:17,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365550164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341071882] [2021-06-05 22:17:17,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:17,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:17,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:17,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:17,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:18,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:18,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:18,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:18,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:18,038 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:17:18,038 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:18,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:18,039 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:18,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341071882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124043359] [2021-06-05 22:17:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:18,099 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:18,267 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 22:17:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:18,268 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:17:18,268 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 22:17:18,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 22:17:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 22:17:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:17:18,269 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:17:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:18,269 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:17:18,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:17:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:18,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:18,269 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:18,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:18,470 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:18,470 INFO L82 PathProgramCache]: Analyzing trace with hash -474527573, now seen corresponding path program 213 times [2021-06-05 22:17:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:18,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677596496] [2021-06-05 22:17:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:18,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:18,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677596496] [2021-06-05 22:17:18,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677596496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:18,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489836916] [2021-06-05 22:17:18,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:18,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:18,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:18,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:18,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:18,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:18,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:18,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:18,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:18,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:18,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:18,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:18,723 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:18,724 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:18,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:18,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:18,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489836916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:18,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:18,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:18,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586552076] [2021-06-05 22:17:18,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:18,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:18,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:18,769 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:18,984 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 22:17:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:18,984 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:18,985 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 22:17:18,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 22:17:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 22:17:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:18,986 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:18,986 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:18,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:18,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:18,986 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:19,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-06-05 22:17:19,187 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash -727682838, now seen corresponding path program 214 times [2021-06-05 22:17:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:19,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656699980] [2021-06-05 22:17:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:19,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:19,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656699980] [2021-06-05 22:17:19,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656699980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:19,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28765908] [2021-06-05 22:17:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:19,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:19,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:19,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:19,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:19,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,493 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:17:19,493 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:19,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:19,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:19,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:19,511 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-05 22:17:19,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:19,512 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:19,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28765908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:19,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:19,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:19,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235867899] [2021-06-05 22:17:19,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:19,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:19,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:19,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:19,562 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:19,672 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 22:17:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:19,673 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:17:19,673 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:19,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 22:17:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:19,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:19,674 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:19,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:19,674 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:19,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:19,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:19,675 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:19,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:19,875 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:19,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1175020561, now seen corresponding path program 215 times [2021-06-05 22:17:19,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:19,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287457346] [2021-06-05 22:17:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:19,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:19,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287457346] [2021-06-05 22:17:19,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287457346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:19,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230050517] [2021-06-05 22:17:19,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:20,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:20,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:20,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:20,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:20,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,110 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:20,110 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:20,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:20,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:20,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230050517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:20,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:20,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:20,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239205688] [2021-06-05 22:17:20,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:20,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:20,148 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:20,304 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 22:17:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:20,304 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:20,304 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:20,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:20,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 22:17:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:20,306 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:20,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:20,306 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:20,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:20,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:20,306 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:20,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-06-05 22:17:20,507 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1137149490, now seen corresponding path program 216 times [2021-06-05 22:17:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:20,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555720793] [2021-06-05 22:17:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:20,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:20,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555720793] [2021-06-05 22:17:20,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555720793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:20,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393717332] [2021-06-05 22:17:20,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:20,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:20,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:20,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:20,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:20,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,844 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:17:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:20,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:20,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:20,865 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:20,865 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 22:17:20,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:20,866 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:20,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393717332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:20,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:20,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:20,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443716600] [2021-06-05 22:17:20,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:20,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:20,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:20,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:20,936 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:21,125 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 22:17:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:21,126 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:17:21,126 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:21,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 22:17:21,127 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 22:17:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:21,127 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 22:17:21,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 22:17:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:21,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:21,128 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-05 22:17:21,328 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1710250363, now seen corresponding path program 217 times [2021-06-05 22:17:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779592505] [2021-06-05 22:17:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:21,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:21,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779592505] [2021-06-05 22:17:21,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779592505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:21,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152005612] [2021-06-05 22:17:21,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152005612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:21,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:21,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:21,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123421938] [2021-06-05 22:17:21,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:21,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:21,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:21,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:21,556 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:21,663 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 22:17:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:21,664 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:17:21,664 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:17:21,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:17:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 22:17:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:17:21,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:17:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:21,666 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:17:21,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:17:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:21,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:21,666 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:21,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:21,881 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2082106650, now seen corresponding path program 218 times [2021-06-05 22:17:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:21,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664233986] [2021-06-05 22:17:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664233986] [2021-06-05 22:17:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664233986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909304617] [2021-06-05 22:17:21,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:22,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:22,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:22,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909304617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:22,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:22,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:22,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077462182] [2021-06-05 22:17:22,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:22,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:22,118 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:22,247 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 22:17:22,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:22,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:22,248 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:17:22,248 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:17:22,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:22,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:17:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-06-05 22:17:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 22:17:22,250 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 22:17:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:22,250 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 22:17:22,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 22:17:22,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:22,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:22,250 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:22,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4208 [2021-06-05 22:17:22,473 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1360711919, now seen corresponding path program 219 times [2021-06-05 22:17:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:22,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490421497] [2021-06-05 22:17:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:22,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490421497] [2021-06-05 22:17:22,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490421497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:22,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046267636] [2021-06-05 22:17:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:22,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:22,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:17:22,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:22,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:22,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:22,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:22,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:22,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:22,773 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:22,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:22,774 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:17:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:22,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046267636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:22,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:22,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:22,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356012713] [2021-06-05 22:17:22,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:22,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:22,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:22,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:22,816 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:22,906 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 22:17:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:22,907 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:17:22,907 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:17:22,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:17:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 22:17:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:22,913 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:22,913 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:22,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:22,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:22,913 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:23,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4215,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:23,114 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2102833296, now seen corresponding path program 220 times [2021-06-05 22:17:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:23,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043216704] [2021-06-05 22:17:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:23,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043216704] [2021-06-05 22:17:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043216704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201594686] [2021-06-05 22:17:23,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:23,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:23,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:17:23,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:17:23,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:23,338 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:23,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:17:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:23,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201594686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:23,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:23,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:23,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247105768] [2021-06-05 22:17:23,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:23,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:23,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:23,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:23,364 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:23,463 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 22:17:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:23,463 INFO L225 Difference]: With dead ends: 87 [2021-06-05 22:17:23,463 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 22:17:23,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 22:17:23,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 22:17:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 22:17:23,465 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 22:17:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:23,465 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 22:17:23,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 22:17:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:23,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:23,466 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:23,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:23,681 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1120265771, now seen corresponding path program 221 times [2021-06-05 22:17:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:23,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654097153] [2021-06-05 22:17:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:23,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:23,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654097153] [2021-06-05 22:17:23,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654097153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:23,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357648589] [2021-06-05 22:17:23,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:23,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:23,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:23,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:23,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:23,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:23,962 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:23,962 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:23,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:23,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:24,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357648589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:24,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:24,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138913362] [2021-06-05 22:17:24,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:24,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:24,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:24,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:24,015 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:24,200 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 22:17:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:24,201 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:17:24,201 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:17:24,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:17:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-06-05 22:17:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:24,202 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:24,202 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:24,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:24,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:24,203 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:24,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:24,403 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash 867110506, now seen corresponding path program 222 times [2021-06-05 22:17:24,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:24,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868526196] [2021-06-05 22:17:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:24,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:24,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868526196] [2021-06-05 22:17:24,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868526196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:24,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97480073] [2021-06-05 22:17:24,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:24,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:24,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:24,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:24,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:24,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:24,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:24,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:24,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:24,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:24,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:24,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:24,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:24,673 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:24,673 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:24,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:24,675 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:24,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97480073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:24,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:24,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:24,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368789178] [2021-06-05 22:17:24,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:24,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:24,716 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:24,820 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 22:17:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:24,821 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:17:24,821 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:17:24,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:17:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 22:17:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 22:17:24,822 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 22:17:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:24,822 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 22:17:24,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 22:17:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:24,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:24,823 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:25,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:25,023 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 419772783, now seen corresponding path program 223 times [2021-06-05 22:17:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:25,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560152179] [2021-06-05 22:17:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:25,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560152179] [2021-06-05 22:17:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560152179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:25,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151113354] [2021-06-05 22:17:25,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:25,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:25,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:25,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,283 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:25,283 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:25,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:25,284 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151113354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:25,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:25,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329675565] [2021-06-05 22:17:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:25,323 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:25,496 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-06-05 22:17:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:25,497 INFO L225 Difference]: With dead ends: 91 [2021-06-05 22:17:25,497 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:17:25,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:25,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:17:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-06-05 22:17:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:25,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 22:17:25,498 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 22:17:25,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:25,498 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 22:17:25,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 22:17:25,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:25,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:25,499 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:25,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 22:17:25,699 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:25,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:25,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1563024462, now seen corresponding path program 224 times [2021-06-05 22:17:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:25,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001252179] [2021-06-05 22:17:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:25,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001252179] [2021-06-05 22:17:25,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001252179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:25,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140656358] [2021-06-05 22:17:25,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:25,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:25,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:25,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:25,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:25,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:25,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:25,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:25,950 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:25,950 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:25,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:25,956 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:26,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140656358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:26,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:26,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435840832] [2021-06-05 22:17:26,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:26,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:26,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:26,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:26,023 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:26,205 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 22:17:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:26,206 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:17:26,206 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 22:17:26,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 22:17:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 22:17:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 22:17:26,207 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 22:17:26,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:26,207 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 22:17:26,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 22:17:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:26,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:26,208 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:26,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:26,413 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1708011093, now seen corresponding path program 225 times [2021-06-05 22:17:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:26,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025907140] [2021-06-05 22:17:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:26,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025907140] [2021-06-05 22:17:26,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025907140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:26,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357986405] [2021-06-05 22:17:26,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:26,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:26,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:26,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:26,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:26,663 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:26,663 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:26,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:26,664 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:26,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357986405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:26,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:26,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:26,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991234462] [2021-06-05 22:17:26,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:26,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:26,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:26,710 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:26,915 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 22:17:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:26,915 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:17:26,915 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 22:17:26,915 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:26,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 22:17:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2021-06-05 22:17:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:26,916 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:26,916 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:26,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:26,917 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:26,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:26,917 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:27,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4284 [2021-06-05 22:17:27,117 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1454855828, now seen corresponding path program 226 times [2021-06-05 22:17:27,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:27,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658455926] [2021-06-05 22:17:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:27,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658455926] [2021-06-05 22:17:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658455926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733399793] [2021-06-05 22:17:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:27,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:27,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:27,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:27,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,416 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:17:27,416 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:27,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:27,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:27,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 22:17:27,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:27,435 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:27,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733399793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:27,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:27,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997827286] [2021-06-05 22:17:27,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:27,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:27,486 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:27,596 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 22:17:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:27,597 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:17:27,597 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:27,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 22:17:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:27,598 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:27,598 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:27,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:27,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:27,598 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:27,599 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:27,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-06-05 22:17:27,799 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1007518105, now seen corresponding path program 227 times [2021-06-05 22:17:27,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:27,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913889578] [2021-06-05 22:17:27,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:27,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913889578] [2021-06-05 22:17:27,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913889578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:27,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498399210] [2021-06-05 22:17:27,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:27,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:27,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:28,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:28,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:28,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:28,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,039 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:28,040 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:28,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:28,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:28,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498399210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:28,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:28,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:28,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146566796] [2021-06-05 22:17:28,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:28,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:28,079 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:28,249 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 22:17:28,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:28,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:28,249 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:17:28,250 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 22:17:28,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 225.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 22:17:28,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2021-06-05 22:17:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 22:17:28,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 22:17:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:28,251 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 22:17:28,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 22:17:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:28,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:28,251 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:28,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:28,452 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -975279140, now seen corresponding path program 228 times [2021-06-05 22:17:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:28,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778488865] [2021-06-05 22:17:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:28,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778488865] [2021-06-05 22:17:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778488865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:28,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261740881] [2021-06-05 22:17:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:28,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:28,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:28,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:28,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:28,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:28,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:28,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:28,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,742 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:17:28,743 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:28,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:28,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:28,761 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 22:17:28,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:28,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:28,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261740881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:28,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:28,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:28,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580050297] [2021-06-05 22:17:28,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:28,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:28,835 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:28,982 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 22:17:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:28,982 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:17:28,983 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:28,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 22:17:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 22:17:28,984 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 22:17:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:28,984 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 22:17:28,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 22:17:28,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:28,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:28,984 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:29,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:29,185 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:29,185 INFO L82 PathProgramCache]: Analyzing trace with hash 472288303, now seen corresponding path program 229 times [2021-06-05 22:17:29,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:29,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676906202] [2021-06-05 22:17:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:29,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676906202] [2021-06-05 22:17:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676906202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767569865] [2021-06-05 22:17:29,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:29,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:29,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:29,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767569865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:29,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:29,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:29,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946621862] [2021-06-05 22:17:29,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:29,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:29,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:29,417 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:29,522 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 22:17:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:29,523 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:17:29,523 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 22:17:29,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 22:17:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 22:17:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 22:17:29,524 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 22:17:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:29,524 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 22:17:29,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 22:17:29,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:29,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:29,524 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:29,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-06-05 22:17:29,740 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash 100432016, now seen corresponding path program 230 times [2021-06-05 22:17:29,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:29,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201737933] [2021-06-05 22:17:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:29,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201737933] [2021-06-05 22:17:29,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201737933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825049042] [2021-06-05 22:17:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:29,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:29,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:29,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825049042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:29,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:29,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379701889] [2021-06-05 22:17:29,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:29,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:29,995 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:30,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:30,143 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 22:17:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:30,143 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:17:30,144 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:17:30,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:17:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-06-05 22:17:30,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:17:30,145 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:17:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:30,145 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:17:30,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:17:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:30,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:30,145 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:30,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 22:17:30,345 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:30,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1546720405, now seen corresponding path program 231 times [2021-06-05 22:17:30,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:30,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073878332] [2021-06-05 22:17:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:30,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:30,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073878332] [2021-06-05 22:17:30,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073878332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:30,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137337559] [2021-06-05 22:17:30,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:30,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:30,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:30,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:30,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:30,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:30,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:30,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:30,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:30,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:30,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:30,650 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:30,650 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:30,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:30,651 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:30,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137337559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:30,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:30,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:30,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627969838] [2021-06-05 22:17:30,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:30,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:30,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:30,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:30,698 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:31,018 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2021-06-05 22:17:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:31,019 INFO L225 Difference]: With dead ends: 110 [2021-06-05 22:17:31,019 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 22:17:31,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 22:17:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 22:17:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 22:17:31,020 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 22:17:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:31,020 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 22:17:31,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 22:17:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:31,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:31,020 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:31,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4348,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:31,221 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:31,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1799875670, now seen corresponding path program 232 times [2021-06-05 22:17:31,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:31,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703809301] [2021-06-05 22:17:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:31,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703809301] [2021-06-05 22:17:31,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703809301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:31,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494844838] [2021-06-05 22:17:31,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:31,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:31,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:31,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:31,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:31,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:31,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:31,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:31,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:31,588 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 22:17:31,588 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:31,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:31,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 22:17:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494844838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:31,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:31,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662853228] [2021-06-05 22:17:31,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:31,643 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:31,777 INFO L93 Difference]: Finished difference Result 107 states and 211 transitions. [2021-06-05 22:17:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:31,777 INFO L225 Difference]: With dead ends: 107 [2021-06-05 22:17:31,777 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 22:17:31,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 22:17:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 22:17:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 22:17:31,778 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 22:17:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:31,779 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 22:17:31,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 22:17:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:31,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:31,779 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:31,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4360,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:31,979 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:31,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:31,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2047753903, now seen corresponding path program 233 times [2021-06-05 22:17:31,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:31,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319713419] [2021-06-05 22:17:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:32,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:32,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319713419] [2021-06-05 22:17:32,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319713419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:32,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195098936] [2021-06-05 22:17:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:32,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:32,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:32,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:32,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:32,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:32,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:32,280 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:32,280 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:32,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:32,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:32,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195098936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:32,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:32,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:32,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671670098] [2021-06-05 22:17:32,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:32,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:32,321 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:32,550 INFO L93 Difference]: Finished difference Result 110 states and 215 transitions. [2021-06-05 22:17:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:32,551 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:32,551 INFO L225 Difference]: With dead ends: 110 [2021-06-05 22:17:32,551 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 22:17:32,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 22:17:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-06-05 22:17:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 22:17:32,552 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 22:17:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:32,552 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 22:17:32,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 22:17:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:32,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:32,553 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:32,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:32,753 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 64956658, now seen corresponding path program 234 times [2021-06-05 22:17:32,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:32,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047947604] [2021-06-05 22:17:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:32,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047947604] [2021-06-05 22:17:32,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047947604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20433524] [2021-06-05 22:17:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:32,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:33,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:33,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:33,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:33,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:33,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:33,106 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 22:17:33,107 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:33,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:33,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 22:17:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:33,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20433524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:33,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:33,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358994561] [2021-06-05 22:17:33,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:33,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:33,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:33,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:33,186 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:33,391 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 22:17:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:33,405 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:17:33,405 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 22:17:33,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 294.0ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 22:17:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2021-06-05 22:17:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 22:17:33,407 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 22:17:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:33,407 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 22:17:33,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 22:17:33,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:33,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:33,408 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:33,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4389,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:33,621 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524101, now seen corresponding path program 235 times [2021-06-05 22:17:33,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:33,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567551254] [2021-06-05 22:17:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:33,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567551254] [2021-06-05 22:17:33,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567551254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163663311] [2021-06-05 22:17:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:33,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:33,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163663311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:33,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:33,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926527067] [2021-06-05 22:17:33,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:33,881 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:34,018 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 22:17:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:34,019 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:17:34,019 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:17:34,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:17:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 22:17:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 22:17:34,021 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 22:17:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:34,021 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 22:17:34,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 22:17:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:34,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:34,022 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:34,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4411,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:34,229 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1140667814, now seen corresponding path program 236 times [2021-06-05 22:17:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326362967] [2021-06-05 22:17:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:34,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:34,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326362967] [2021-06-05 22:17:34,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326362967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:34,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138539460] [2021-06-05 22:17:34,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:34,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138539460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:34,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:34,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:34,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775745383] [2021-06-05 22:17:34,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:34,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:34,513 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:34,683 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 22:17:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:34,684 INFO L225 Difference]: With dead ends: 93 [2021-06-05 22:17:34,684 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 22:17:34,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 22:17:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-06-05 22:17:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 22:17:34,685 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 22:17:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:34,685 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 22:17:34,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 22:17:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:34,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:34,686 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:34,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4414 [2021-06-05 22:17:34,886 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:34,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2100269423, now seen corresponding path program 237 times [2021-06-05 22:17:34,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:34,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577298114] [2021-06-05 22:17:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:34,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577298114] [2021-06-05 22:17:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577298114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056585073] [2021-06-05 22:17:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:35,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:35,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:35,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056585073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:35,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:35,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:35,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656517499] [2021-06-05 22:17:35,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:35,100 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:35,215 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-06-05 22:17:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:35,216 INFO L225 Difference]: With dead ends: 95 [2021-06-05 22:17:35,216 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 22:17:35,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 22:17:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-06-05 22:17:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:35,217 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:35,217 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:35,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:35,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:35,217 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:35,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-05 22:17:35,418 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash 127975282, now seen corresponding path program 238 times [2021-06-05 22:17:35,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:35,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138242583] [2021-06-05 22:17:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:35,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138242583] [2021-06-05 22:17:35,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138242583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:35,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668484505] [2021-06-05 22:17:35,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:35,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:35,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668484505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:35,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:35,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:35,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597157865] [2021-06-05 22:17:35,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:35,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:35,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:35,671 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:35,803 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 22:17:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:17:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:35,803 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:17:35,803 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 22:17:35,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 22:17:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-06-05 22:17:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 22:17:35,804 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 22:17:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:35,804 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 22:17:35,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 22:17:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:35,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:35,805 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:36,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:36,027 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash -336533025, now seen corresponding path program 239 times [2021-06-05 22:17:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473639597] [2021-06-05 22:17:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:36,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:36,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473639597] [2021-06-05 22:17:36,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473639597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:36,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627900402] [2021-06-05 22:17:36,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:36,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 22:17:36,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:36,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:36,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:36,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:36,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 22:17:36,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:36,315 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:36,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:36,317 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 22:17:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627900402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:36,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:36,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:36,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222939712] [2021-06-05 22:17:36,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:36,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:36,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:36,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:36,356 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:36,468 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 22:17:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:17:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:36,468 INFO L225 Difference]: With dead ends: 85 [2021-06-05 22:17:36,468 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 22:17:36,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 22:17:36,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-06-05 22:17:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 22:17:36,470 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 22:17:36,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:36,470 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 22:17:36,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 22:17:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:36,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:36,470 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:36,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-05 22:17:36,670 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash 405588352, now seen corresponding path program 240 times [2021-06-05 22:17:36,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:36,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087081387] [2021-06-05 22:17:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:36,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087081387] [2021-06-05 22:17:36,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087081387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:36,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060518122] [2021-06-05 22:17:36,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:36,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:36,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:36,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 22:17:36,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 22:17:36,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:36,906 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:36,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:17:36,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 22:17:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060518122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:36,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:36,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:36,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947766752] [2021-06-05 22:17:36,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:36,931 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:37,019 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 22:17:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:37,019 INFO L225 Difference]: With dead ends: 83 [2021-06-05 22:17:37,019 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 22:17:37,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 22:17:37,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-06-05 22:17:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 22:17:37,020 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 22:17:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 22:17:37,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 22:17:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:37,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:37,021 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:37,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:37,221 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash -576979173, now seen corresponding path program 241 times [2021-06-05 22:17:37,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:37,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34190032] [2021-06-05 22:17:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:37,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34190032] [2021-06-05 22:17:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34190032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039511613] [2021-06-05 22:17:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:37,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:37,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:37,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:37,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:37,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:37,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:37,488 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:37,488 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:37,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:37,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:37,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039511613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:37,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:37,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:37,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904418162] [2021-06-05 22:17:37,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:37,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:37,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:37,534 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:37,747 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 22:17:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:37,747 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:17:37,747 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:17:37,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:17:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-06-05 22:17:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 22:17:37,749 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 22:17:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:37,749 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 22:17:37,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 22:17:37,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:37,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:37,749 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:37,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4441 [2021-06-05 22:17:37,950 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash -830134438, now seen corresponding path program 242 times [2021-06-05 22:17:37,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:37,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696793512] [2021-06-05 22:17:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:38,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696793512] [2021-06-05 22:17:38,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696793512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292782649] [2021-06-05 22:17:38,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:38,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:38,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:38,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:38,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:38,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:38,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:38,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,231 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:17:38,231 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:38,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:38,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:38,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292782649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:38,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:38,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033134930] [2021-06-05 22:17:38,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:38,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:38,271 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:38,374 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 22:17:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:38,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:38,375 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:17:38,375 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 22:17:38,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 22:17:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-06-05 22:17:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 22:17:38,376 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 22:17:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:38,376 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 22:17:38,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 22:17:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:38,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:38,376 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:38,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4459,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:38,577 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:38,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:38,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1277472161, now seen corresponding path program 243 times [2021-06-05 22:17:38,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:38,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573819893] [2021-06-05 22:17:38,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:38,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:38,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573819893] [2021-06-05 22:17:38,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573819893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78198864] [2021-06-05 22:17:38,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:38,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:38,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:38,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:38,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:38,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:38,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:38,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:38,838 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:17:38,838 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:38,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:38,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:17:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78198864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:38,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:38,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:38,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86154783] [2021-06-05 22:17:38,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:38,875 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:39,086 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 22:17:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:39,087 INFO L225 Difference]: With dead ends: 93 [2021-06-05 22:17:39,087 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 22:17:39,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 22:17:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-06-05 22:17:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 22:17:39,088 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 22:17:39,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:39,088 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 22:17:39,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 22:17:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:39,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:39,088 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:39,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4468,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:39,289 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1034697890, now seen corresponding path program 244 times [2021-06-05 22:17:39,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:39,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256951608] [2021-06-05 22:17:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:39,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:39,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256951608] [2021-06-05 22:17:39,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256951608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:39,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578081231] [2021-06-05 22:17:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:39,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:39,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:39,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:39,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:39,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:39,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:39,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:39,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:39,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:39,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:39,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:39,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:39,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:39,532 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:17:39,532 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:39,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:39,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:17:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:39,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578081231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:39,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:39,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:39,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756465496] [2021-06-05 22:17:39,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:39,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:39,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:39,594 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:39,778 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 22:17:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:39,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:39,779 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:17:39,779 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:17:39,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:39,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:17:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-06-05 22:17:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 148 transitions. [2021-06-05 22:17:39,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 148 transitions. Word has length 17 [2021-06-05 22:17:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:39,780 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 148 transitions. [2021-06-05 22:17:39,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:39,780 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2021-06-05 22:17:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:39,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:39,780 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:39,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-05 22:17:39,981 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 10766149, now seen corresponding path program 245 times [2021-06-05 22:17:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:39,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815228342] [2021-06-05 22:17:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:40,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815228342] [2021-06-05 22:17:40,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815228342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719589069] [2021-06-05 22:17:40,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:40,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:40,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:40,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:40,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:40,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,228 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:40,228 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:40,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:40,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:40,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719589069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:40,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:40,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628978791] [2021-06-05 22:17:40,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:40,274 INFO L87 Difference]: Start difference. First operand 74 states and 148 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:40,504 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 22:17:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:40,504 INFO L225 Difference]: With dead ends: 111 [2021-06-05 22:17:40,504 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 22:17:40,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 22:17:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-06-05 22:17:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 22:17:40,505 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 22:17:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:40,506 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 22:17:40,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:40,506 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 22:17:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:40,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:40,506 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:40,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-06-05 22:17:40,706 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -242389116, now seen corresponding path program 246 times [2021-06-05 22:17:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:40,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738156176] [2021-06-05 22:17:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:40,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738156176] [2021-06-05 22:17:40,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738156176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:40,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115654846] [2021-06-05 22:17:40,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:40,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:40,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:40,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:40,989 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:17:40,989 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:40,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:40,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:41,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-06-05 22:17:41,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:41,008 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:41,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115654846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:41,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:41,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676485159] [2021-06-05 22:17:41,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:41,057 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:41,159 INFO L93 Difference]: Finished difference Result 100 states and 195 transitions. [2021-06-05 22:17:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:41,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:41,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:41,159 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:17:41,159 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 22:17:41,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:41,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 22:17:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 22:17:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 22:17:41,161 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 22:17:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:41,161 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 22:17:41,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 22:17:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:41,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:41,161 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:41,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-06-05 22:17:41,362 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash -689726839, now seen corresponding path program 247 times [2021-06-05 22:17:41,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:41,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563682956] [2021-06-05 22:17:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:41,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563682956] [2021-06-05 22:17:41,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563682956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446632417] [2021-06-05 22:17:41,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:41,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:41,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:41,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:41,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:41,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:41,603 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:41,603 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:41,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:41,604 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:41,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446632417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:41,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:41,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:41,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831333408] [2021-06-05 22:17:41,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:41,642 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:41,835 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 22:17:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:41,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:41,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:41,835 INFO L225 Difference]: With dead ends: 113 [2021-06-05 22:17:41,835 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:17:41,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:17:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2021-06-05 22:17:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 22:17:41,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 22:17:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:41,837 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 22:17:41,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 22:17:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:41,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:41,838 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:42,053 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1622443212, now seen corresponding path program 248 times [2021-06-05 22:17:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25812648] [2021-06-05 22:17:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:42,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25812648] [2021-06-05 22:17:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25812648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532441453] [2021-06-05 22:17:42,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:42,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:42,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:42,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:42,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:42,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:42,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,344 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:17:42,344 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:42,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:42,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:42,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 22:17:42,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:42,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:42,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532441453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:42,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:42,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202504012] [2021-06-05 22:17:42,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:42,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:42,434 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:42,607 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 22:17:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:42,608 INFO L225 Difference]: With dead ends: 102 [2021-06-05 22:17:42,608 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 22:17:42,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 22:17:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 22:17:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-06-05 22:17:42,609 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-06-05 22:17:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-06-05 22:17:42,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-06-05 22:17:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:42,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:42,610 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:42,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4531,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:42,833 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1224956641, now seen corresponding path program 249 times [2021-06-05 22:17:42,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:42,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370294984] [2021-06-05 22:17:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:42,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:42,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370294984] [2021-06-05 22:17:42,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370294984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:42,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477859851] [2021-06-05 22:17:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:42,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:43,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477859851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:43,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:43,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:43,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475198407] [2021-06-05 22:17:43,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:43,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:43,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:43,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:43,065 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:43,175 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-06-05 22:17:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:43,175 INFO L225 Difference]: With dead ends: 86 [2021-06-05 22:17:43,176 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 22:17:43,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:43,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 22:17:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-06-05 22:17:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 22:17:43,177 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 22:17:43,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:43,177 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 22:17:43,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 22:17:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:43,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:43,181 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:43,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4551 [2021-06-05 22:17:43,381 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1596812928, now seen corresponding path program 250 times [2021-06-05 22:17:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:43,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966943344] [2021-06-05 22:17:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:43,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966943344] [2021-06-05 22:17:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966943344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869803226] [2021-06-05 22:17:43,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:43,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:43,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:43,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869803226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:43,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:43,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:43,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902470038] [2021-06-05 22:17:43,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:43,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:43,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:43,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:43,647 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:43,789 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2021-06-05 22:17:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:43,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:43,790 INFO L225 Difference]: With dead ends: 79 [2021-06-05 22:17:43,790 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 22:17:43,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 22:17:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-06-05 22:17:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2021-06-05 22:17:43,791 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 17 [2021-06-05 22:17:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:43,791 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2021-06-05 22:17:43,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2021-06-05 22:17:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:43,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:43,791 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:43,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:43,992 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1051001947, now seen corresponding path program 251 times [2021-06-05 22:17:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:43,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967532122] [2021-06-05 22:17:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:44,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:44,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967532122] [2021-06-05 22:17:44,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967532122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:44,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131953735] [2021-06-05 22:17:44,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:44,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:17:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:44,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:44,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:44,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:44,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:44,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:44,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:44,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:44,289 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:44,290 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:44,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:44,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:44,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131953735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:44,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:44,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044817725] [2021-06-05 22:17:44,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:44,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:44,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:44,338 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:44,676 INFO L93 Difference]: Finished difference Result 112 states and 215 transitions. [2021-06-05 22:17:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:17:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:44,677 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:44,677 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 22:17:44,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:17:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 22:17:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 22:17:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 22:17:44,678 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 22:17:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:44,678 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 22:17:44,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 22:17:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:44,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:44,678 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:44,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4560 [2021-06-05 22:17:44,879 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash 797846682, now seen corresponding path program 252 times [2021-06-05 22:17:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:44,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562840856] [2021-06-05 22:17:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:44,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562840856] [2021-06-05 22:17:44,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562840856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:44,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859378013] [2021-06-05 22:17:44,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:17:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:45,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:45,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:45,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:45,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,263 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 22:17:45,263 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:45,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:45,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 22:17:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:45,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859378013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:45,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:45,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660529010] [2021-06-05 22:17:45,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:45,321 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:45,438 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2021-06-05 22:17:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:45,439 INFO L225 Difference]: With dead ends: 103 [2021-06-05 22:17:45,439 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:17:45,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:17:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-06-05 22:17:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 22:17:45,440 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 22:17:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:45,440 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 22:17:45,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 22:17:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:45,440 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:45,440 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:45,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4572,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,641 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:45,641 INFO L82 PathProgramCache]: Analyzing trace with hash 350508959, now seen corresponding path program 253 times [2021-06-05 22:17:45,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:45,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900692904] [2021-06-05 22:17:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:45,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:45,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900692904] [2021-06-05 22:17:45,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900692904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227283945] [2021-06-05 22:17:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:45,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:45,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:45,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:45,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:45,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:45,948 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 22:17:45,948 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:45,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:45,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 22:17:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:45,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227283945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:45,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:45,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:45,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752149473] [2021-06-05 22:17:45,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:45,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:45,994 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:46,328 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-06-05 22:17:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:46,329 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:46,329 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:46,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-06-05 22:17:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 22:17:46,330 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 22:17:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:46,330 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 22:17:46,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 22:17:46,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:46,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:46,331 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-06-05 22:17:46,533 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1632288286, now seen corresponding path program 254 times [2021-06-05 22:17:46,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:46,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783619869] [2021-06-05 22:17:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:46,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:46,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783619869] [2021-06-05 22:17:46,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783619869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:46,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597481875] [2021-06-05 22:17:46,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:46,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:46,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:46,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:46,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:46,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:46,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:46,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:46,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:46,882 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 22:17:46,882 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:46,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:17:46,884 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 22:17:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:46,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597481875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:46,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:46,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877260272] [2021-06-05 22:17:46,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:46,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:46,962 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:47,221 INFO L93 Difference]: Finished difference Result 105 states and 203 transitions. [2021-06-05 22:17:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:47,221 INFO L225 Difference]: With dead ends: 105 [2021-06-05 22:17:47,221 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 22:17:47,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:17:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 22:17:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-06-05 22:17:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 22:17:47,222 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 22:17:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:47,223 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 22:17:47,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 22:17:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:47,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:47,223 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:47,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-06-05 22:17:47,425 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -184720843, now seen corresponding path program 255 times [2021-06-05 22:17:47,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:47,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868359476] [2021-06-05 22:17:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:47,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:47,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868359476] [2021-06-05 22:17:47,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868359476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:47,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103738129] [2021-06-05 22:17:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:47,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:47,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:47,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103738129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:47,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:47,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:47,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887848690] [2021-06-05 22:17:47,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:47,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:47,709 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:47,853 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 22:17:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:47,853 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:17:47,853 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 22:17:47,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 22:17:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-06-05 22:17:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 22:17:47,855 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 22:17:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:47,855 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 22:17:47,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 22:17:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:47,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:47,855 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:48,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4614 [2021-06-05 22:17:48,055 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -556577130, now seen corresponding path program 256 times [2021-06-05 22:17:48,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:48,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083688955] [2021-06-05 22:17:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:48,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083688955] [2021-06-05 22:17:48,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083688955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:48,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063059300] [2021-06-05 22:17:48,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:48,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:48,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:48,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:48,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:48,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:48,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:48,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:48,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:48,504 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:48,508 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:48,585 INFO L628 ElimStorePlain]: treesize reduction 37, result has 70.9 percent of original size [2021-06-05 22:17:48,585 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:48,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 22:17:48,587 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:170, output treesize:48 [2021-06-05 22:17:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:48,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063059300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:48,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313245181] [2021-06-05 22:17:48,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:48,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:48,639 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:48,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:48,815 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 22:17:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:48,815 INFO L225 Difference]: With dead ends: 89 [2021-06-05 22:17:48,815 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 22:17:48,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 22:17:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-06-05 22:17:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 22:17:48,816 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-06-05 22:17:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:48,816 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 22:17:48,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:48,816 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 22:17:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:48,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:48,817 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:49,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:49,017 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash 403024479, now seen corresponding path program 257 times [2021-06-05 22:17:49,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:49,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719506275] [2021-06-05 22:17:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:49,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:49,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719506275] [2021-06-05 22:17:49,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719506275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:49,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637409253] [2021-06-05 22:17:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:49,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:49,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:49,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:49,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637409253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:49,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:49,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:49,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377829989] [2021-06-05 22:17:49,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:49,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:49,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:49,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:49,230 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:49,364 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 22:17:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:49,364 INFO L225 Difference]: With dead ends: 91 [2021-06-05 22:17:49,364 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 22:17:49,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 22:17:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2021-06-05 22:17:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 22:17:49,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 22:17:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:49,366 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 22:17:49,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 22:17:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:49,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:49,366 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:49,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4646 [2021-06-05 22:17:49,585 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1569269662, now seen corresponding path program 258 times [2021-06-05 22:17:49,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:49,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492792341] [2021-06-05 22:17:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:49,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492792341] [2021-06-05 22:17:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492792341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:49,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683622411] [2021-06-05 22:17:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:49,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:49,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:49,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:49,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683622411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:49,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:49,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231066843] [2021-06-05 22:17:49,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:49,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:49,827 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:49,975 INFO L93 Difference]: Finished difference Result 80 states and 156 transitions. [2021-06-05 22:17:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:49,976 INFO L225 Difference]: With dead ends: 80 [2021-06-05 22:17:49,976 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 22:17:49,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 22:17:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-06-05 22:17:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-06-05 22:17:49,977 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 17 [2021-06-05 22:17:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:49,977 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-06-05 22:17:49,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-06-05 22:17:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:49,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:49,977 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:50,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4649,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:50,178 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1966083435, now seen corresponding path program 259 times [2021-06-05 22:17:50,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:50,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074587285] [2021-06-05 22:17:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:50,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:50,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074587285] [2021-06-05 22:17:50,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074587285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:50,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539634936] [2021-06-05 22:17:50,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:50,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:50,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:50,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:50,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:50,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:50,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:50,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:50,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:50,456 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:50,456 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:50,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:50,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:50,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539634936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:50,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:50,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:17:50,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962075037] [2021-06-05 22:17:50,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:17:50,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:50,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:17:50,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:50,503 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:50,927 INFO L93 Difference]: Finished difference Result 108 states and 203 transitions. [2021-06-05 22:17:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:17:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:50,928 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:17:50,928 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 22:17:50,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:17:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 22:17:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 22:17:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:50,929 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:50,929 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:50,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:50,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:50,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:50,929 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:51,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4655,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:51,130 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1712928170, now seen corresponding path program 260 times [2021-06-05 22:17:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:51,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358255112] [2021-06-05 22:17:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:51,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:51,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358255112] [2021-06-05 22:17:51,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358255112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61352211] [2021-06-05 22:17:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:51,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:51,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:17:51,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,510 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:17:51,510 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:51,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:51,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:51,528 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-06-05 22:17:51,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:51,529 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:51,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:51,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61352211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:51,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:51,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:17:51,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675893498] [2021-06-05 22:17:51,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:17:51,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:51,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:17:51,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:51,582 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:51,904 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 22:17:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:51,904 INFO L225 Difference]: With dead ends: 106 [2021-06-05 22:17:51,904 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:17:51,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:17:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:17:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-06-05 22:17:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:51,906 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:51,906 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:51,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:51,906 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:51,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:51,906 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:52,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4665 [2021-06-05 22:17:52,107 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1265590447, now seen corresponding path program 261 times [2021-06-05 22:17:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:52,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637709616] [2021-06-05 22:17:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:52,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:52,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637709616] [2021-06-05 22:17:52,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637709616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:52,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007257752] [2021-06-05 22:17:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:52,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:17:52,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:52,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:52,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:17:52,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:52,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:52,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:52,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:52,367 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:17:52,367 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:52,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:52,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:17:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:52,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007257752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:52,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:52,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:17:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262309648] [2021-06-05 22:17:52,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:17:52,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:17:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:52,408 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:52,759 INFO L93 Difference]: Finished difference Result 112 states and 214 transitions. [2021-06-05 22:17:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:52,760 INFO L225 Difference]: With dead ends: 112 [2021-06-05 22:17:52,760 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 22:17:52,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 22:17:52,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-06-05 22:17:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 22:17:52,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 22:17:52,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:52,761 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 22:17:52,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 22:17:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:52,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:52,761 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:52,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:52,962 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash -717206798, now seen corresponding path program 262 times [2021-06-05 22:17:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:52,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757291485] [2021-06-05 22:17:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:53,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:53,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757291485] [2021-06-05 22:17:53,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757291485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:53,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588905032] [2021-06-05 22:17:53,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:53,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:53,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:53,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:17:53,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:53,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:17:53,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:17:53,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:53,275 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:17:53,276 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:17:53,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:17:53,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:17:53,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:17:53,294 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-06-05 22:17:53,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:17:53,294 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:17:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588905032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:17:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813569345] [2021-06-05 22:17:53,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:17:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:17:53,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:17:53,368 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:53,896 INFO L93 Difference]: Finished difference Result 108 states and 205 transitions. [2021-06-05 22:17:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:17:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:53,896 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:17:53,896 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 22:17:53,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:17:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 22:17:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-06-05 22:17:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:17:53,898 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:17:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:53,898 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:17:53,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:17:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:53,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:53,898 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:54,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4684 [2021-06-05 22:17:54,098 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 730360645, now seen corresponding path program 263 times [2021-06-05 22:17:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:54,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877774449] [2021-06-05 22:17:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:54,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:54,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877774449] [2021-06-05 22:17:54,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877774449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:54,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066382948] [2021-06-05 22:17:54,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:54,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:54,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:54,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066382948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:54,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:54,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:54,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907773856] [2021-06-05 22:17:54,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:54,347 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:54,499 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-05 22:17:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:54,500 INFO L225 Difference]: With dead ends: 94 [2021-06-05 22:17:54,500 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:17:54,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:17:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-06-05 22:17:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 22:17:54,501 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 22:17:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:54,501 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 22:17:54,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 22:17:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:54,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:54,501 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:54,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:54,702 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 358504358, now seen corresponding path program 264 times [2021-06-05 22:17:54,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:54,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154060303] [2021-06-05 22:17:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:54,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:54,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154060303] [2021-06-05 22:17:54,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154060303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:54,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755691876] [2021-06-05 22:17:54,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:54,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:17:54,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:54,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:55,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755691876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:55,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:55,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 22:17:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272423715] [2021-06-05 22:17:55,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:17:55,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:17:55,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:17:55,011 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:55,317 INFO L93 Difference]: Finished difference Result 100 states and 187 transitions. [2021-06-05 22:17:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:17:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:55,318 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:17:55,318 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 22:17:55,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:17:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 22:17:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-06-05 22:17:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 22:17:55,319 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 22:17:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:55,319 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 22:17:55,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 22:17:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:55,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:55,319 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4701 [2021-06-05 22:17:55,533 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:55,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1318105967, now seen corresponding path program 265 times [2021-06-05 22:17:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:55,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093628692] [2021-06-05 22:17:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:55,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093628692] [2021-06-05 22:17:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093628692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:55,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356681061] [2021-06-05 22:17:55,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356681061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:55,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:55,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714323651] [2021-06-05 22:17:55,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:55,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:55,754 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:55,928 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-05 22:17:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:55,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:55,928 INFO L225 Difference]: With dead ends: 95 [2021-06-05 22:17:55,929 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 22:17:55,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 22:17:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2021-06-05 22:17:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 22:17:55,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 22:17:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:55,930 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 22:17:55,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 22:17:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:55,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:55,930 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:56,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4707 [2021-06-05 22:17:56,130 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -654188174, now seen corresponding path program 266 times [2021-06-05 22:17:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:56,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266663899] [2021-06-05 22:17:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:56,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:56,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266663899] [2021-06-05 22:17:56,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266663899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:56,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610741647] [2021-06-05 22:17:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:56,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:17:56,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:56,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:56,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610741647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:56,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:56,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 22:17:56,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175793114] [2021-06-05 22:17:56,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:17:56,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:56,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:17:56,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:17:56,394 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:56,680 INFO L93 Difference]: Finished difference Result 100 states and 185 transitions. [2021-06-05 22:17:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:17:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:56,681 INFO L225 Difference]: With dead ends: 100 [2021-06-05 22:17:56,681 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:17:56,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:17:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:17:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-06-05 22:17:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 22:17:56,682 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-06-05 22:17:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:56,682 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 22:17:56,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 22:17:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:56,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:56,682 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:56,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4710,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:56,883 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:56,883 INFO L82 PathProgramCache]: Analyzing trace with hash -453490593, now seen corresponding path program 267 times [2021-06-05 22:17:56,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:56,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704471604] [2021-06-05 22:17:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:56,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704471604] [2021-06-05 22:17:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704471604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61513171] [2021-06-05 22:17:56,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:56,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:17:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:57,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61513171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:57,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:57,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:57,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105563555] [2021-06-05 22:17:57,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:57,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:57,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:57,103 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:57,297 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2021-06-05 22:17:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:17:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:57,298 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:17:57,298 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 22:17:57,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:17:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 22:17:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-06-05 22:17:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 131 transitions. [2021-06-05 22:17:57,299 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 131 transitions. Word has length 17 [2021-06-05 22:17:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:57,299 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 131 transitions. [2021-06-05 22:17:57,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 131 transitions. [2021-06-05 22:17:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 22:17:57,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:57,299 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:57,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4717 [2021-06-05 22:17:57,500 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:57,500 INFO L82 PathProgramCache]: Analyzing trace with hash -499750656, now seen corresponding path program 268 times [2021-06-05 22:17:57,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:57,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159334025] [2021-06-05 22:17:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:57,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:57,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159334025] [2021-06-05 22:17:57,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159334025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:57,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367539243] [2021-06-05 22:17:57,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:57,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:17:57,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:17:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:57,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367539243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:57,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:57,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 22:17:57,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074891557] [2021-06-05 22:17:57,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:17:57,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:57,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:17:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:17:57,729 INFO L87 Difference]: Start difference. First operand 67 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:57,971 INFO L93 Difference]: Finished difference Result 75 states and 141 transitions. [2021-06-05 22:17:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:17:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 22:17:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:57,971 INFO L225 Difference]: With dead ends: 75 [2021-06-05 22:17:57,971 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 22:17:57,971 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:17:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 22:17:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-06-05 22:17:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 22:17:57,972 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-06-05 22:17:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 22:17:57,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 22:17:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:17:57,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:57,973 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:58,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:58,173 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -287533742, now seen corresponding path program 269 times [2021-06-05 22:17:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:58,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598704622] [2021-06-05 22:17:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:58,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:58,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598704622] [2021-06-05 22:17:58,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598704622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:58,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440617759] [2021-06-05 22:17:58,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:58,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:17:58,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:17:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:58,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440617759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:58,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:58,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:17:58,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009015236] [2021-06-05 22:17:58,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:17:58,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:17:58,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:17:58,563 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:17:59,087 INFO L93 Difference]: Finished difference Result 120 states and 226 transitions. [2021-06-05 22:17:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:17:59,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:17:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:17:59,087 INFO L225 Difference]: With dead ends: 120 [2021-06-05 22:17:59,088 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 22:17:59,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:17:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 22:17:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 22:17:59,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:59,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 149 transitions. [2021-06-05 22:17:59,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 149 transitions. Word has length 18 [2021-06-05 22:17:59,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:17:59,089 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 149 transitions. [2021-06-05 22:17:59,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:17:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 149 transitions. [2021-06-05 22:17:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:17:59,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:17:59,089 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:17:59,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4726 [2021-06-05 22:17:59,290 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:17:59,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:17:59,290 INFO L82 PathProgramCache]: Analyzing trace with hash -277178606, now seen corresponding path program 270 times [2021-06-05 22:17:59,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:17:59,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355972290] [2021-06-05 22:17:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:17:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:17:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:59,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:17:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355972290] [2021-06-05 22:17:59,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355972290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399127684] [2021-06-05 22:17:59,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:17:59,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:17:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:17:59,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:17:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:17:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:17:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399127684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:17:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:17:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:17:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183773225] [2021-06-05 22:17:59,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:17:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:17:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:17:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:17:59,733 INFO L87 Difference]: Start difference. First operand 77 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:00,173 INFO L93 Difference]: Finished difference Result 124 states and 234 transitions. [2021-06-05 22:18:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:00,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:00,174 INFO L225 Difference]: With dead ends: 124 [2021-06-05 22:18:00,174 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 22:18:00,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 603.5ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:18:00,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 22:18:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-06-05 22:18:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.974025974025974) internal successors, (152), 77 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 152 transitions. [2021-06-05 22:18:00,175 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 152 transitions. Word has length 18 [2021-06-05 22:18:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:00,175 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 152 transitions. [2021-06-05 22:18:00,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 152 transitions. [2021-06-05 22:18:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:00,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:00,175 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:00,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4739,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:00,376 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 858925398, now seen corresponding path program 271 times [2021-06-05 22:18:00,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:00,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975316661] [2021-06-05 22:18:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:00,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975316661] [2021-06-05 22:18:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975316661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921474078] [2021-06-05 22:18:00,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:00,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921474078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:00,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:00,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:00,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776596430] [2021-06-05 22:18:00,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:00,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:00,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:00,809 INFO L87 Difference]: Start difference. First operand 78 states and 152 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:01,190 INFO L93 Difference]: Finished difference Result 125 states and 237 transitions. [2021-06-05 22:18:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:01,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:01,190 INFO L225 Difference]: With dead ends: 125 [2021-06-05 22:18:01,191 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 22:18:01,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:01,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 22:18:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-06-05 22:18:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 155 transitions. [2021-06-05 22:18:01,192 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 155 transitions. Word has length 18 [2021-06-05 22:18:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:01,192 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 155 transitions. [2021-06-05 22:18:01,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2021-06-05 22:18:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:01,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:01,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:01,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:01,393 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash 618479250, now seen corresponding path program 272 times [2021-06-05 22:18:01,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:01,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584450146] [2021-06-05 22:18:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:01,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584450146] [2021-06-05 22:18:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584450146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:01,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856086279] [2021-06-05 22:18:01,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:01,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:01,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:01,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:02,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856086279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:02,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:02,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:02,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756170848] [2021-06-05 22:18:02,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:02,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:02,011 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:02,361 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-05 22:18:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:02,362 INFO L225 Difference]: With dead ends: 126 [2021-06-05 22:18:02,362 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 22:18:02,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 673.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 22:18:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 22:18:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 22:18:02,363 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-06-05 22:18:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:02,363 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 22:18:02,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 22:18:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:02,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:02,363 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:02,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 22:18:02,564 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash -82013738, now seen corresponding path program 273 times [2021-06-05 22:18:02,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:02,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436278268] [2021-06-05 22:18:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:02,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:02,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436278268] [2021-06-05 22:18:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436278268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:02,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699759560] [2021-06-05 22:18:02,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:02,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:18:02,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:02,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:02,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699759560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:02,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:02,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 22:18:02,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546142290] [2021-06-05 22:18:02,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:02,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:02,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:02,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:02,973 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:03,346 INFO L93 Difference]: Finished difference Result 138 states and 259 transitions. [2021-06-05 22:18:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:03,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:03,347 INFO L225 Difference]: With dead ends: 138 [2021-06-05 22:18:03,347 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 22:18:03,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 22:18:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 81. [2021-06-05 22:18:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 22:18:03,348 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 22:18:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:03,348 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 22:18:03,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 22:18:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:03,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:03,348 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:03,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:03,549 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:03,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1609570898, now seen corresponding path program 274 times [2021-06-05 22:18:03,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:03,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127009820] [2021-06-05 22:18:03,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:03,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127009820] [2021-06-05 22:18:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127009820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404735471] [2021-06-05 22:18:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:03,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:03,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:03,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404735471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:03,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:03,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 22:18:03,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255768571] [2021-06-05 22:18:03,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:18:03,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:03,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:18:03,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:18:03,943 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:04,254 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 22:18:04,376 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 22:18:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:04,391 INFO L93 Difference]: Finished difference Result 126 states and 241 transitions. [2021-06-05 22:18:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:04,391 INFO L225 Difference]: With dead ends: 126 [2021-06-05 22:18:04,391 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 22:18:04,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 22:18:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2021-06-05 22:18:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 22:18:04,393 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 22:18:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:04,393 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 22:18:04,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 22:18:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:04,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:04,394 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:04,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-05 22:18:04,609 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 628775332, now seen corresponding path program 275 times [2021-06-05 22:18:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:04,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837932741] [2021-06-05 22:18:04,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:05,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837932741] [2021-06-05 22:18:05,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837932741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939056384] [2021-06-05 22:18:05,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:05,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:05,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939056384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:05,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:05,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796122857] [2021-06-05 22:18:05,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:05,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:05,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:05,482 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:06,120 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2021-06-05 22:18:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:06,121 INFO L225 Difference]: With dead ends: 104 [2021-06-05 22:18:06,121 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 22:18:06,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1036.6ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:18:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 22:18:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2021-06-05 22:18:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 82 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 167 transitions. [2021-06-05 22:18:06,122 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 167 transitions. Word has length 18 [2021-06-05 22:18:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:06,122 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 167 transitions. [2021-06-05 22:18:06,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 167 transitions. [2021-06-05 22:18:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:06,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:06,122 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:06,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4803,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:06,323 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1764879336, now seen corresponding path program 276 times [2021-06-05 22:18:06,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:06,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71468555] [2021-06-05 22:18:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:06,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71468555] [2021-06-05 22:18:06,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71468555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:06,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468183467] [2021-06-05 22:18:06,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:06,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:06,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:06,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:06,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468183467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:06,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:06,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:06,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910517682] [2021-06-05 22:18:06,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:06,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:06,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:06,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:06,921 INFO L87 Difference]: Start difference. First operand 83 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:07,258 INFO L93 Difference]: Finished difference Result 108 states and 209 transitions. [2021-06-05 22:18:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:07,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:07,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:07,258 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:18:07,259 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 22:18:07,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 22:18:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-06-05 22:18:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 22:18:07,260 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 22:18:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:07,260 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 22:18:07,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 22:18:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:07,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:07,260 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:07,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4850,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:07,465 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1524433188, now seen corresponding path program 277 times [2021-06-05 22:18:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626668432] [2021-06-05 22:18:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:07,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:07,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626668432] [2021-06-05 22:18:07,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626668432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:07,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431006190] [2021-06-05 22:18:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:07,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:08,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431006190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:08,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:08,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:08,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651822078] [2021-06-05 22:18:08,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:08,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:08,184 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:08,486 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 22:18:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:08,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:08,487 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:18:08,487 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:18:08,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:18:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 22:18:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 22:18:08,488 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 18 [2021-06-05 22:18:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:08,488 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 22:18:08,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 22:18:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:08,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:08,488 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:08,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4897,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:08,689 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 823940200, now seen corresponding path program 278 times [2021-06-05 22:18:08,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:08,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282070957] [2021-06-05 22:18:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:08,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:08,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282070957] [2021-06-05 22:18:08,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282070957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:08,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718876869] [2021-06-05 22:18:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:09,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718876869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:09,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:09,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:09,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991414565] [2021-06-05 22:18:09,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:09,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:09,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:09,326 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:09,954 INFO L93 Difference]: Finished difference Result 121 states and 228 transitions. [2021-06-05 22:18:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:09,955 INFO L225 Difference]: With dead ends: 121 [2021-06-05 22:18:09,955 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 22:18:09,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 768.3ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:18:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 22:18:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-06-05 22:18:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 22:18:09,956 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 22:18:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:09,956 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 22:18:09,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 22:18:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:09,956 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:09,956 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:10,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4931,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:10,157 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1779442460, now seen corresponding path program 279 times [2021-06-05 22:18:10,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:10,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108502450] [2021-06-05 22:18:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:10,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108502450] [2021-06-05 22:18:10,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108502450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77290676] [2021-06-05 22:18:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:10,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:18:10,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:10,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77290676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:10,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:10,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987053714] [2021-06-05 22:18:10,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:10,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:10,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:10,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:10,834 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:11,174 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 22:18:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:11,175 INFO L225 Difference]: With dead ends: 109 [2021-06-05 22:18:11,175 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 22:18:11,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 22:18:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-06-05 22:18:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 22:18:11,176 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 22:18:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:11,176 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 22:18:11,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 22:18:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:11,176 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:11,176 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:11,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4977 [2021-06-05 22:18:11,377 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1489852162, now seen corresponding path program 280 times [2021-06-05 22:18:11,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:11,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788126702] [2021-06-05 22:18:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:11,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788126702] [2021-06-05 22:18:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788126702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856040387] [2021-06-05 22:18:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:11,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:11,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856040387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039155940] [2021-06-05 22:18:11,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:11,889 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:12,469 INFO L93 Difference]: Finished difference Result 158 states and 302 transitions. [2021-06-05 22:18:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:12,470 INFO L225 Difference]: With dead ends: 158 [2021-06-05 22:18:12,470 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 22:18:12,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 676.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 22:18:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2021-06-05 22:18:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 22:18:12,472 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 22:18:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:12,472 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 22:18:12,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 22:18:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:12,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:12,472 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:12,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-06-05 22:18:12,673 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1730298310, now seen corresponding path program 281 times [2021-06-05 22:18:12,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:12,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767403831] [2021-06-05 22:18:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:12,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:12,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767403831] [2021-06-05 22:18:12,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767403831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:12,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57593847] [2021-06-05 22:18:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:12,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:12,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:12,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:13,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57593847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:13,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:13,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:13,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111793526] [2021-06-05 22:18:13,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:13,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:13,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:13,234 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:13,898 INFO L93 Difference]: Finished difference Result 159 states and 304 transitions. [2021-06-05 22:18:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:13,898 INFO L225 Difference]: With dead ends: 159 [2021-06-05 22:18:13,898 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 22:18:13,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 22:18:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2021-06-05 22:18:13,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 22:18:13,900 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 22:18:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:13,900 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 22:18:13,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 22:18:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:13,900 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:13,900 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:14,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-06-05 22:18:14,101 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1864175998, now seen corresponding path program 282 times [2021-06-05 22:18:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:14,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016848077] [2021-06-05 22:18:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:14,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016848077] [2021-06-05 22:18:14,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016848077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773158658] [2021-06-05 22:18:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:14,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:14,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:14,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:14,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:14,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773158658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:14,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:14,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:14,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417158039] [2021-06-05 22:18:14,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:14,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:14,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:14,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:14,580 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:15,185 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 22:18:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:15,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:15,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:15,186 INFO L225 Difference]: With dead ends: 160 [2021-06-05 22:18:15,186 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 22:18:15,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 22:18:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 22:18:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 22:18:15,187 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 18 [2021-06-05 22:18:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:15,187 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 22:18:15,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 22:18:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:15,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:15,188 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:15,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5092,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:15,388 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -739206662, now seen corresponding path program 283 times [2021-06-05 22:18:15,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:15,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706467649] [2021-06-05 22:18:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:15,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706467649] [2021-06-05 22:18:15,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706467649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:15,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122932398] [2021-06-05 22:18:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122932398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:15,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:15,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122668949] [2021-06-05 22:18:15,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:15,986 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:16,507 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 22:18:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:16,508 INFO L225 Difference]: With dead ends: 148 [2021-06-05 22:18:16,508 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 22:18:16,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 22:18:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-06-05 22:18:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 22:18:16,509 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 22:18:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:16,509 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 22:18:16,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 22:18:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:16,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:16,510 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:16,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5138,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:16,710 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1142552988, now seen corresponding path program 284 times [2021-06-05 22:18:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:16,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002985932] [2021-06-05 22:18:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:16,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002985932] [2021-06-05 22:18:16,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002985932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119560829] [2021-06-05 22:18:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:16,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:16,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:16,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:17,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119560829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:17,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:17,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:17,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250379984] [2021-06-05 22:18:17,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:17,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:17,271 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:17,895 INFO L93 Difference]: Finished difference Result 210 states and 415 transitions. [2021-06-05 22:18:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:17,895 INFO L225 Difference]: With dead ends: 210 [2021-06-05 22:18:17,895 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 22:18:17,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:18:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 22:18:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2021-06-05 22:18:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 22:18:17,897 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 22:18:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:17,897 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 22:18:17,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 22:18:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:17,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:17,898 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:18,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5185 [2021-06-05 22:18:18,098 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1843045976, now seen corresponding path program 285 times [2021-06-05 22:18:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:18,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51961839] [2021-06-05 22:18:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:18,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51961839] [2021-06-05 22:18:18,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51961839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:18,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749886341] [2021-06-05 22:18:18,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:18,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:18:18,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:18,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749886341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:18,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:18,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:18,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446577653] [2021-06-05 22:18:18,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:18,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:18,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:18,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:18,666 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:19,253 INFO L93 Difference]: Finished difference Result 227 states and 443 transitions. [2021-06-05 22:18:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:18:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:19,254 INFO L225 Difference]: With dead ends: 227 [2021-06-05 22:18:19,254 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 22:18:19,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 683.9ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 22:18:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2021-06-05 22:18:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2711864406779663) internal successors, (268), 118 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2021-06-05 22:18:19,256 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 18 [2021-06-05 22:18:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:19,256 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2021-06-05 22:18:19,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2021-06-05 22:18:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:19,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:19,257 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:19,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5232,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:19,473 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash -151461340, now seen corresponding path program 286 times [2021-06-05 22:18:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:19,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643325517] [2021-06-05 22:18:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:19,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643325517] [2021-06-05 22:18:19,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643325517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936783213] [2021-06-05 22:18:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:19,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:19,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:19,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936783213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:19,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:19,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:19,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104531432] [2021-06-05 22:18:19,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:19,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:19,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:19,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:19,977 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:20,625 INFO L93 Difference]: Finished difference Result 215 states and 425 transitions. [2021-06-05 22:18:20,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:18:20,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:20,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:20,626 INFO L225 Difference]: With dead ends: 215 [2021-06-05 22:18:20,626 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 22:18:20,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 700.9ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 22:18:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 22:18:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 22:18:20,627 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 22:18:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:20,628 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 22:18:20,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 22:18:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:20,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:20,628 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:20,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5279 [2021-06-05 22:18:20,828 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1916691518, now seen corresponding path program 287 times [2021-06-05 22:18:20,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:20,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757577028] [2021-06-05 22:18:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:20,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757577028] [2021-06-05 22:18:20,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757577028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:20,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843757190] [2021-06-05 22:18:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:20,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:18:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843757190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:21,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:21,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:18:21,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531296841] [2021-06-05 22:18:21,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:21,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:21,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:21,353 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:21,810 INFO L93 Difference]: Finished difference Result 226 states and 445 transitions. [2021-06-05 22:18:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:18:21,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:21,810 INFO L225 Difference]: With dead ends: 226 [2021-06-05 22:18:21,811 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 22:18:21,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 22:18:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 121. [2021-06-05 22:18:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2916666666666665) internal successors, (275), 120 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 275 transitions. [2021-06-05 22:18:21,812 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 275 transitions. Word has length 18 [2021-06-05 22:18:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:21,812 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 275 transitions. [2021-06-05 22:18:21,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 275 transitions. [2021-06-05 22:18:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:21,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:21,813 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:22,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5325,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:22,013 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash -686691142, now seen corresponding path program 288 times [2021-06-05 22:18:22,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:22,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181393825] [2021-06-05 22:18:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:22,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181393825] [2021-06-05 22:18:22,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181393825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140447786] [2021-06-05 22:18:22,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:22,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:18:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:22,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140447786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:22,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:22,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:22,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502432017] [2021-06-05 22:18:22,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:22,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:22,679 INFO L87 Difference]: Start difference. First operand 121 states and 275 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:23,287 INFO L93 Difference]: Finished difference Result 228 states and 447 transitions. [2021-06-05 22:18:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:18:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:23,288 INFO L225 Difference]: With dead ends: 228 [2021-06-05 22:18:23,288 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 22:18:23,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:18:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 22:18:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 120. [2021-06-05 22:18:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.277310924369748) internal successors, (271), 119 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 271 transitions. [2021-06-05 22:18:23,289 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 271 transitions. Word has length 18 [2021-06-05 22:18:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:23,290 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 271 transitions. [2021-06-05 22:18:23,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 271 transitions. [2021-06-05 22:18:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:23,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:23,290 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:23,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-06-05 22:18:23,490 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:23,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:23,491 INFO L82 PathProgramCache]: Analyzing trace with hash -513443450, now seen corresponding path program 289 times [2021-06-05 22:18:23,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:23,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127509646] [2021-06-05 22:18:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:23,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127509646] [2021-06-05 22:18:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127509646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173755492] [2021-06-05 22:18:23,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:23,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173755492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:23,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:23,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:23,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827038739] [2021-06-05 22:18:23,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:23,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:23,979 INFO L87 Difference]: Start difference. First operand 120 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:24,417 INFO L93 Difference]: Finished difference Result 211 states and 419 transitions. [2021-06-05 22:18:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:24,418 INFO L225 Difference]: With dead ends: 211 [2021-06-05 22:18:24,418 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 22:18:24,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 22:18:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2021-06-05 22:18:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.28099173553719) internal successors, (276), 121 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 276 transitions. [2021-06-05 22:18:24,419 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 276 transitions. Word has length 18 [2021-06-05 22:18:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:24,420 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 276 transitions. [2021-06-05 22:18:24,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:24,420 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 276 transitions. [2021-06-05 22:18:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:24,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:24,420 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:24,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-06-05 22:18:24,621 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1351423662, now seen corresponding path program 290 times [2021-06-05 22:18:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:24,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124051426] [2021-06-05 22:18:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:25,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:25,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124051426] [2021-06-05 22:18:25,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124051426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:25,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765186715] [2021-06-05 22:18:25,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:25,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:25,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:25,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765186715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:25,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:25,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:25,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665981421] [2021-06-05 22:18:25,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:25,462 INFO L87 Difference]: Start difference. First operand 122 states and 276 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:25,865 INFO L93 Difference]: Finished difference Result 237 states and 477 transitions. [2021-06-05 22:18:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:25,866 INFO L225 Difference]: With dead ends: 237 [2021-06-05 22:18:25,866 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 22:18:25,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:18:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 22:18:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2021-06-05 22:18:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3285714285714287) internal successors, (326), 140 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 326 transitions. [2021-06-05 22:18:25,868 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 326 transitions. Word has length 18 [2021-06-05 22:18:25,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:25,868 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 326 transitions. [2021-06-05 22:18:25,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 326 transitions. [2021-06-05 22:18:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:25,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:25,869 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:26,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5623,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:26,069 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash -215319658, now seen corresponding path program 291 times [2021-06-05 22:18:26,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:26,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837047114] [2021-06-05 22:18:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:26,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:26,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837047114] [2021-06-05 22:18:26,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837047114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:26,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653556099] [2021-06-05 22:18:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:26,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:18:26,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:26,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:26,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653556099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:26,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:26,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:26,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366470468] [2021-06-05 22:18:26,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:26,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:26,691 INFO L87 Difference]: Start difference. First operand 141 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:27,357 INFO L93 Difference]: Finished difference Result 278 states and 548 transitions. [2021-06-05 22:18:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:18:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:27,357 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:18:27,358 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 22:18:27,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 694.6ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 22:18:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 144. [2021-06-05 22:18:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3496503496503496) internal successors, (336), 143 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 336 transitions. [2021-06-05 22:18:27,359 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 336 transitions. Word has length 18 [2021-06-05 22:18:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:27,360 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 336 transitions. [2021-06-05 22:18:27,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 336 transitions. [2021-06-05 22:18:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:27,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:27,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:27,560 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash -455765806, now seen corresponding path program 292 times [2021-06-05 22:18:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127269844] [2021-06-05 22:18:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:27,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:27,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127269844] [2021-06-05 22:18:27,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127269844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:27,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566429956] [2021-06-05 22:18:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:27,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:27,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:27,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566429956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416551274] [2021-06-05 22:18:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:28,200 INFO L87 Difference]: Start difference. First operand 144 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:28,834 INFO L93 Difference]: Finished difference Result 279 states and 555 transitions. [2021-06-05 22:18:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:18:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:28,835 INFO L225 Difference]: With dead ends: 279 [2021-06-05 22:18:28,835 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 22:18:28,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 22:18:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2021-06-05 22:18:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.3655172413793104) internal successors, (343), 145 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 343 transitions. [2021-06-05 22:18:28,837 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 343 transitions. Word has length 18 [2021-06-05 22:18:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:28,837 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 343 transitions. [2021-06-05 22:18:28,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 343 transitions. [2021-06-05 22:18:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:28,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:28,837 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:29,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5705 [2021-06-05 22:18:29,038 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1156258794, now seen corresponding path program 293 times [2021-06-05 22:18:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:29,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227775903] [2021-06-05 22:18:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:29,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:29,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227775903] [2021-06-05 22:18:29,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227775903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:29,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80515738] [2021-06-05 22:18:29,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:29,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:29,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:29,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:29,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80515738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:29,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:29,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689350972] [2021-06-05 22:18:29,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:29,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:29,621 INFO L87 Difference]: Start difference. First operand 146 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:30,410 INFO L93 Difference]: Finished difference Result 268 states and 542 transitions. [2021-06-05 22:18:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:18:30,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:30,411 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:18:30,411 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 22:18:30,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:18:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 22:18:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 147. [2021-06-05 22:18:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3767123287671232) internal successors, (347), 146 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 347 transitions. [2021-06-05 22:18:30,413 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 347 transitions. Word has length 18 [2021-06-05 22:18:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:30,413 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 347 transitions. [2021-06-05 22:18:30,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 347 transitions. [2021-06-05 22:18:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:30,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:30,414 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:30,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5739 [2021-06-05 22:18:30,614 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:30,614 INFO L82 PathProgramCache]: Analyzing trace with hash 535325842, now seen corresponding path program 294 times [2021-06-05 22:18:30,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:30,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062454226] [2021-06-05 22:18:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:30,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:30,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062454226] [2021-06-05 22:18:30,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062454226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:30,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617695296] [2021-06-05 22:18:30,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:30,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:18:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:18:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:18:31,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:18:31,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:18:31,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:18:31,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:18:31,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:18:31,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:18:31,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,456 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 22:18:31,456 INFO L628 ElimStorePlain]: treesize reduction 650, result has 12.5 percent of original size [2021-06-05 22:18:31,456 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:18:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:18:31,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:31,496 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-05 22:18:31,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:18:31,500 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:18:31,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:18:31,533 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-05 22:18:31,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:18:31,534 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 22:18:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617695296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:31,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:31,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:31,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123261178] [2021-06-05 22:18:31,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:31,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:31,688 INFO L87 Difference]: Start difference. First operand 147 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:32,464 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-06-05 22:18:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:18:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:32,465 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:18:32,465 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 22:18:32,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 983.5ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 22:18:32,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2021-06-05 22:18:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 22:18:32,467 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 18 [2021-06-05 22:18:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:32,467 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 22:18:32,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 22:18:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:32,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:32,468 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:32,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-05 22:18:32,668 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1287512490, now seen corresponding path program 295 times [2021-06-05 22:18:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:32,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788979728] [2021-06-05 22:18:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:32,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788979728] [2021-06-05 22:18:32,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788979728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144681588] [2021-06-05 22:18:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:32,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:33,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144681588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:33,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:33,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:18:33,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828960257] [2021-06-05 22:18:33,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:33,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:33,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:33,260 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:33,701 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2021-06-05 22:18:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:33,702 INFO L225 Difference]: With dead ends: 220 [2021-06-05 22:18:33,702 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 22:18:33,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:18:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 22:18:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2021-06-05 22:18:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 22:18:33,704 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 22:18:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:33,704 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 22:18:33,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 22:18:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:33,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:33,705 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:33,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:33,917 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:33,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1527958638, now seen corresponding path program 296 times [2021-06-05 22:18:33,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:33,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441513219] [2021-06-05 22:18:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:34,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:34,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441513219] [2021-06-05 22:18:34,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441513219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:34,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718842175] [2021-06-05 22:18:34,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:34,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:34,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718842175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:34,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:34,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:18:34,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953181546] [2021-06-05 22:18:34,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:34,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:34,450 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:35,048 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 22:18:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:18:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:35,048 INFO L225 Difference]: With dead ends: 242 [2021-06-05 22:18:35,048 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 22:18:35,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 653.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 22:18:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2021-06-05 22:18:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4078947368421053) internal successors, (366), 152 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 366 transitions. [2021-06-05 22:18:35,050 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 366 transitions. Word has length 18 [2021-06-05 22:18:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:35,051 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 366 transitions. [2021-06-05 22:18:35,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 366 transitions. [2021-06-05 22:18:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:35,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:35,051 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:35,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-05 22:18:35,251 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:35,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2066515670, now seen corresponding path program 297 times [2021-06-05 22:18:35,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:35,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464551901] [2021-06-05 22:18:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:35,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:35,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464551901] [2021-06-05 22:18:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464551901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:35,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380548106] [2021-06-05 22:18:35,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:35,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:18:35,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:35,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:35,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380548106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:35,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:35,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:18:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475797322] [2021-06-05 22:18:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:35,693 INFO L87 Difference]: Start difference. First operand 153 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:36,217 INFO L93 Difference]: Finished difference Result 244 states and 515 transitions. [2021-06-05 22:18:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:18:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:36,218 INFO L225 Difference]: With dead ends: 244 [2021-06-05 22:18:36,218 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 22:18:36,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 22:18:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 154. [2021-06-05 22:18:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.418300653594771) internal successors, (370), 153 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 370 transitions. [2021-06-05 22:18:36,220 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 370 transitions. Word has length 18 [2021-06-05 22:18:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:36,220 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 370 transitions. [2021-06-05 22:18:36,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 370 transitions. [2021-06-05 22:18:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:36,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:36,221 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:36,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:36,421 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash -536866990, now seen corresponding path program 298 times [2021-06-05 22:18:36,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:36,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689175399] [2021-06-05 22:18:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:36,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689175399] [2021-06-05 22:18:36,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689175399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:36,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227956488] [2021-06-05 22:18:36,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:36,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:36,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227956488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:36,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:36,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:18:36,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179656948] [2021-06-05 22:18:36,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:36,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:36,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:36,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:36,870 INFO L87 Difference]: Start difference. First operand 154 states and 370 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:37,459 INFO L93 Difference]: Finished difference Result 229 states and 492 transitions. [2021-06-05 22:18:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:18:37,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:37,460 INFO L225 Difference]: With dead ends: 229 [2021-06-05 22:18:37,460 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 22:18:37,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 22:18:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2021-06-05 22:18:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:37,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 22:18:37,462 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 22:18:37,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:37,462 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 22:18:37,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:37,462 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 22:18:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:37,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:37,462 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:37,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-06-05 22:18:37,663 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash 100022482, now seen corresponding path program 299 times [2021-06-05 22:18:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:37,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550879054] [2021-06-05 22:18:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:37,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550879054] [2021-06-05 22:18:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550879054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295800890] [2021-06-05 22:18:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:37,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:37,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295800890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:38,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:38,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:18:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514826053] [2021-06-05 22:18:38,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:38,188 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:38,696 INFO L93 Difference]: Finished difference Result 246 states and 538 transitions. [2021-06-05 22:18:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:18:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:38,696 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:18:38,697 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 22:18:38,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:18:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 22:18:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2021-06-05 22:18:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 22:18:38,699 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 22:18:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:38,699 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 22:18:38,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 22:18:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:38,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:38,699 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:38,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-05 22:18:38,900 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash -600470506, now seen corresponding path program 300 times [2021-06-05 22:18:38,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:38,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622572780] [2021-06-05 22:18:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:39,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622572780] [2021-06-05 22:18:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622572780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895813042] [2021-06-05 22:18:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:39,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:18:39,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:39,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:39,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:39,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895813042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:39,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:39,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:18:39,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157926167] [2021-06-05 22:18:39,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:39,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:39,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:39,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:39,493 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:39,977 INFO L93 Difference]: Finished difference Result 258 states and 554 transitions. [2021-06-05 22:18:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:18:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:39,978 INFO L225 Difference]: With dead ends: 258 [2021-06-05 22:18:39,978 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 22:18:39,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:18:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 22:18:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-06-05 22:18:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.451219512195122) internal successors, (402), 164 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 402 transitions. [2021-06-05 22:18:39,980 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 402 transitions. Word has length 18 [2021-06-05 22:18:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:39,980 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 402 transitions. [2021-06-05 22:18:39,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 402 transitions. [2021-06-05 22:18:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:39,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:39,981 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:40,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6016,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:40,181 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1091114130, now seen corresponding path program 301 times [2021-06-05 22:18:40,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:40,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422601194] [2021-06-05 22:18:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:40,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422601194] [2021-06-05 22:18:40,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422601194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:40,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445241227] [2021-06-05 22:18:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:40,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445241227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:40,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:40,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:18:40,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117030153] [2021-06-05 22:18:40,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:40,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:40,712 INFO L87 Difference]: Start difference. First operand 165 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:41,259 INFO L93 Difference]: Finished difference Result 243 states and 531 transitions. [2021-06-05 22:18:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:18:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:41,260 INFO L225 Difference]: With dead ends: 243 [2021-06-05 22:18:41,260 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 22:18:41,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 644.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:41,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 22:18:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 164. [2021-06-05 22:18:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 22:18:41,262 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 22:18:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:41,263 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 22:18:41,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 22:18:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:41,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:41,263 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:41,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6062 [2021-06-05 22:18:41,486 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:41,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1135700308, now seen corresponding path program 302 times [2021-06-05 22:18:41,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:41,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599438676] [2021-06-05 22:18:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:41,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:41,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599438676] [2021-06-05 22:18:41,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599438676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:41,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109126901] [2021-06-05 22:18:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:41,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:41,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:42,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109126901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:42,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:42,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:18:42,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735918579] [2021-06-05 22:18:42,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:18:42,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:42,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:18:42,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:18:42,192 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:42,695 INFO L93 Difference]: Finished difference Result 239 states and 522 transitions. [2021-06-05 22:18:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:42,696 INFO L225 Difference]: With dead ends: 239 [2021-06-05 22:18:42,696 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 22:18:42,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:18:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 22:18:42,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 164. [2021-06-05 22:18:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 22:18:42,698 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 22:18:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:42,698 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 22:18:42,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 22:18:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:42,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:42,698 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:42,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-06-05 22:18:42,899 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash 555884328, now seen corresponding path program 303 times [2021-06-05 22:18:42,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:42,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474580011] [2021-06-05 22:18:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:18:43,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474580011] [2021-06-05 22:18:43,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474580011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849797709] [2021-06-05 22:18:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:43,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:18:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:43,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849797709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:43,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:43,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:18:43,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269821852] [2021-06-05 22:18:43,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:43,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:43,595 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:44,103 INFO L93 Difference]: Finished difference Result 240 states and 522 transitions. [2021-06-05 22:18:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:18:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:44,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:44,103 INFO L225 Difference]: With dead ends: 240 [2021-06-05 22:18:44,103 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 22:18:44,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:18:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 22:18:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2021-06-05 22:18:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:44,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2021-06-05 22:18:44,105 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 18 [2021-06-05 22:18:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:44,105 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2021-06-05 22:18:44,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2021-06-05 22:18:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:44,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:44,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:44,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6282 [2021-06-05 22:18:44,306 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 729132020, now seen corresponding path program 304 times [2021-06-05 22:18:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:44,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754647535] [2021-06-05 22:18:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:44,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:44,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754647535] [2021-06-05 22:18:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754647535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008239082] [2021-06-05 22:18:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:44,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:44,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:44,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:44,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008239082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:44,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:44,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:18:44,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005440650] [2021-06-05 22:18:44,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:18:44,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:44,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:18:44,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:44,961 INFO L87 Difference]: Start difference. First operand 163 states and 394 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:45,317 INFO L93 Difference]: Finished difference Result 180 states and 422 transitions. [2021-06-05 22:18:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:18:45,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:45,317 INFO L225 Difference]: With dead ends: 180 [2021-06-05 22:18:45,317 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 22:18:45,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:18:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 22:18:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2021-06-05 22:18:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4242424242424243) internal successors, (400), 165 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 400 transitions. [2021-06-05 22:18:45,319 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 400 transitions. Word has length 18 [2021-06-05 22:18:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:45,319 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 400 transitions. [2021-06-05 22:18:45,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 400 transitions. [2021-06-05 22:18:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:45,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:45,320 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:45,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6453 [2021-06-05 22:18:45,520 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -547954986, now seen corresponding path program 305 times [2021-06-05 22:18:45,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:45,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875796489] [2021-06-05 22:18:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:45,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:45,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875796489] [2021-06-05 22:18:45,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875796489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:45,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838238470] [2021-06-05 22:18:45,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:45,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:45,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:46,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838238470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:46,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:46,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:46,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149274635] [2021-06-05 22:18:46,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:46,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:46,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:46,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:46,307 INFO L87 Difference]: Start difference. First operand 166 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:46,909 INFO L93 Difference]: Finished difference Result 292 states and 615 transitions. [2021-06-05 22:18:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:18:46,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:46,910 INFO L225 Difference]: With dead ends: 292 [2021-06-05 22:18:46,910 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 22:18:46,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 22:18:46,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 172. [2021-06-05 22:18:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.461988304093567) internal successors, (421), 171 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 421 transitions. [2021-06-05 22:18:46,912 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 421 transitions. Word has length 18 [2021-06-05 22:18:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:46,912 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 421 transitions. [2021-06-05 22:18:46,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 421 transitions. [2021-06-05 22:18:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:46,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:46,913 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:47,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6525,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:47,113 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1143629650, now seen corresponding path program 306 times [2021-06-05 22:18:47,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:47,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126497321] [2021-06-05 22:18:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:47,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:47,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126497321] [2021-06-05 22:18:47,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126497321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:47,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896806336] [2021-06-05 22:18:47,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:47,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:18:47,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896806336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:48,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:18:48,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506797103] [2021-06-05 22:18:48,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:18:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:18:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:18:48,058 INFO L87 Difference]: Start difference. First operand 172 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:48,661 INFO L93 Difference]: Finished difference Result 296 states and 620 transitions. [2021-06-05 22:18:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:18:48,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:48,662 INFO L225 Difference]: With dead ends: 296 [2021-06-05 22:18:48,662 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 22:18:48,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 22:18:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 171. [2021-06-05 22:18:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4529411764705884) internal successors, (417), 170 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 417 transitions. [2021-06-05 22:18:48,664 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 417 transitions. Word has length 18 [2021-06-05 22:18:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:48,664 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 417 transitions. [2021-06-05 22:18:48,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 417 transitions. [2021-06-05 22:18:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:48,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:48,665 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:48,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6691 [2021-06-05 22:18:48,865 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1316877342, now seen corresponding path program 307 times [2021-06-05 22:18:48,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:48,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764894946] [2021-06-05 22:18:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:49,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:49,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764894946] [2021-06-05 22:18:49,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764894946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:49,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571621434] [2021-06-05 22:18:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:49,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:49,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571621434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:49,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:49,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:49,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590203386] [2021-06-05 22:18:49,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:49,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:49,461 INFO L87 Difference]: Start difference. First operand 171 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:50,297 INFO L93 Difference]: Finished difference Result 284 states and 596 transitions. [2021-06-05 22:18:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:18:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:50,298 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:18:50,298 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:18:50,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:18:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:18:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2021-06-05 22:18:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2021-06-05 22:18:50,300 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 18 [2021-06-05 22:18:50,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:50,300 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2021-06-05 22:18:50,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2021-06-05 22:18:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:50,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:50,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:50,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6916,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:50,501 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1902378798, now seen corresponding path program 308 times [2021-06-05 22:18:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:50,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597052723] [2021-06-05 22:18:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:50,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:50,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597052723] [2021-06-05 22:18:50,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597052723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:50,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769598718] [2021-06-05 22:18:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:50,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:18:50,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:51,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769598718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:51,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:51,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:51,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39712317] [2021-06-05 22:18:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:51,050 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:51,452 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-06-05 22:18:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:18:51,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:51,453 INFO L225 Difference]: With dead ends: 245 [2021-06-05 22:18:51,453 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 22:18:51,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:18:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 22:18:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-06-05 22:18:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4251497005988023) internal successors, (405), 167 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 405 transitions. [2021-06-05 22:18:51,455 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 405 transitions. Word has length 18 [2021-06-05 22:18:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:51,455 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 405 transitions. [2021-06-05 22:18:51,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 405 transitions. [2021-06-05 22:18:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:51,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:51,455 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:51,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6988 [2021-06-05 22:18:51,656 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:51,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1686916964, now seen corresponding path program 309 times [2021-06-05 22:18:51,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:51,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971103206] [2021-06-05 22:18:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:51,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971103206] [2021-06-05 22:18:51,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971103206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131932569] [2021-06-05 22:18:51,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:51,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:18:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:52,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131932569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:52,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:52,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:18:52,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706844249] [2021-06-05 22:18:52,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:18:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:18:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:52,259 INFO L87 Difference]: Start difference. First operand 168 states and 405 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:52,743 INFO L93 Difference]: Finished difference Result 328 states and 704 transitions. [2021-06-05 22:18:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:18:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:52,744 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:18:52,744 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:18:52,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:18:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:18:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 189. [2021-06-05 22:18:52,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.515957446808511) internal successors, (473), 188 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 473 transitions. [2021-06-05 22:18:52,747 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 473 transitions. Word has length 18 [2021-06-05 22:18:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:52,747 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 473 transitions. [2021-06-05 22:18:52,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 473 transitions. [2021-06-05 22:18:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:52,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:52,747 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:52,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7064 [2021-06-05 22:18:52,948 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:52,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:52,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1471946328, now seen corresponding path program 310 times [2021-06-05 22:18:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:52,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481959946] [2021-06-05 22:18:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:53,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:53,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481959946] [2021-06-05 22:18:53,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481959946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:53,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622090115] [2021-06-05 22:18:53,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:53,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:18:53,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:53,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622090115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:53,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:53,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:53,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968381460] [2021-06-05 22:18:53,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:53,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:53,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:53,619 INFO L87 Difference]: Start difference. First operand 189 states and 473 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:54,085 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 22:18:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:54,582 INFO L93 Difference]: Finished difference Result 385 states and 804 transitions. [2021-06-05 22:18:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:18:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:54,583 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:18:54,583 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 22:18:54,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1045.5ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:18:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 22:18:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-06-05 22:18:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.5287958115183247) internal successors, (483), 191 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 483 transitions. [2021-06-05 22:18:54,586 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 483 transitions. Word has length 18 [2021-06-05 22:18:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:54,586 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 483 transitions. [2021-06-05 22:18:54,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 483 transitions. [2021-06-05 22:18:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:54,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:54,586 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:54,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 22:18:54,787 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:54,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:54,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1712392476, now seen corresponding path program 311 times [2021-06-05 22:18:54,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:54,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130711392] [2021-06-05 22:18:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:55,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130711392] [2021-06-05 22:18:55,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130711392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196428935] [2021-06-05 22:18:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:55,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:18:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:55,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:55,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196428935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:55,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:55,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:18:55,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843080743] [2021-06-05 22:18:55,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:18:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:18:55,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:18:55,559 INFO L87 Difference]: Start difference. First operand 192 states and 483 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:56,684 INFO L93 Difference]: Finished difference Result 371 states and 780 transitions. [2021-06-05 22:18:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:18:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:56,684 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:18:56,684 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:18:56,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1258.3ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:18:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:18:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 194. [2021-06-05 22:18:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.538860103626943) internal successors, (490), 193 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2021-06-05 22:18:56,687 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 18 [2021-06-05 22:18:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:56,687 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2021-06-05 22:18:56,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2021-06-05 22:18:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:56,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:56,687 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:56,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7132,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:56,888 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:56,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:56,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1882081832, now seen corresponding path program 312 times [2021-06-05 22:18:56,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:56,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232287658] [2021-06-05 22:18:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:57,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:57,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232287658] [2021-06-05 22:18:57,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232287658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:57,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615727811] [2021-06-05 22:18:57,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:57,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:18:57,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:18:57,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:57,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:57,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615727811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:57,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:57,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:18:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92896520] [2021-06-05 22:18:57,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:18:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:18:57,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:18:57,670 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:18:58,582 INFO L93 Difference]: Finished difference Result 328 states and 729 transitions. [2021-06-05 22:18:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:18:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:18:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:18:58,582 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:18:58,582 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:18:58,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1034.7ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:18:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:18:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 205. [2021-06-05 22:18:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5980392156862746) internal successors, (530), 204 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 530 transitions. [2021-06-05 22:18:58,585 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 530 transitions. Word has length 18 [2021-06-05 22:18:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:18:58,585 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 530 transitions. [2021-06-05 22:18:58,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:18:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 530 transitions. [2021-06-05 22:18:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:18:58,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:18:58,586 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:18:58,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7166,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:58,786 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:18:58,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:18:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash -721300828, now seen corresponding path program 313 times [2021-06-05 22:18:58,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:18:58,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470183653] [2021-06-05 22:18:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:18:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:58,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:18:58,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470183653] [2021-06-05 22:18:58,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470183653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:58,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131872951] [2021-06-05 22:18:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:18:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:18:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:18:58,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:18:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:18:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131872951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:18:59,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:18:59,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:18:59,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560713761] [2021-06-05 22:18:59,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:18:59,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:18:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:18:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:18:59,337 INFO L87 Difference]: Start difference. First operand 205 states and 530 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:00,062 INFO L93 Difference]: Finished difference Result 355 states and 772 transitions. [2021-06-05 22:19:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:00,063 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:00,063 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:19:00,064 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 22:19:00,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 22:19:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 195. [2021-06-05 22:19:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.556701030927835) internal successors, (496), 194 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 496 transitions. [2021-06-05 22:19:00,067 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 496 transitions. Word has length 18 [2021-06-05 22:19:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:00,067 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 496 transitions. [2021-06-05 22:19:00,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 496 transitions. [2021-06-05 22:19:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:00,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:00,068 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:00,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7218,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:00,285 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash 690050046, now seen corresponding path program 314 times [2021-06-05 22:19:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:00,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837369960] [2021-06-05 22:19:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:00,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837369960] [2021-06-05 22:19:00,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837369960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:00,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129077004] [2021-06-05 22:19:00,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:00,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:00,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129077004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:00,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:00,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:00,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739990672] [2021-06-05 22:19:00,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:00,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:00,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:00,825 INFO L87 Difference]: Start difference. First operand 195 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:01,333 INFO L93 Difference]: Finished difference Result 308 states and 701 transitions. [2021-06-05 22:19:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:01,334 INFO L225 Difference]: With dead ends: 308 [2021-06-05 22:19:01,334 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 22:19:01,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:19:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 22:19:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2021-06-05 22:19:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.588235294117647) internal successors, (528), 204 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 528 transitions. [2021-06-05 22:19:01,336 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 528 transitions. Word has length 18 [2021-06-05 22:19:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:01,337 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 528 transitions. [2021-06-05 22:19:01,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 528 transitions. [2021-06-05 22:19:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:01,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:01,337 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:01,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7253,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:01,537 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:01,538 INFO L82 PathProgramCache]: Analyzing trace with hash 449603898, now seen corresponding path program 315 times [2021-06-05 22:19:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:01,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132492040] [2021-06-05 22:19:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:01,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:01,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132492040] [2021-06-05 22:19:01,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132492040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:01,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881557231] [2021-06-05 22:19:01,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:01,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:19:01,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:02,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881557231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:02,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:02,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:02,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5763511] [2021-06-05 22:19:02,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:02,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:02,050 INFO L87 Difference]: Start difference. First operand 205 states and 528 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:02,724 INFO L93 Difference]: Finished difference Result 329 states and 740 transitions. [2021-06-05 22:19:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:02,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:02,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:02,725 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:19:02,725 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 22:19:02,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 648.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 22:19:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 207. [2021-06-05 22:19:02,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.5970873786407767) internal successors, (535), 206 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 535 transitions. [2021-06-05 22:19:02,729 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 535 transitions. Word has length 18 [2021-06-05 22:19:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:02,729 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 535 transitions. [2021-06-05 22:19:02,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:02,729 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 535 transitions. [2021-06-05 22:19:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:02,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:02,729 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:02,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7300 [2021-06-05 22:19:02,952 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash -250889090, now seen corresponding path program 316 times [2021-06-05 22:19:02,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:02,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107797464] [2021-06-05 22:19:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:03,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107797464] [2021-06-05 22:19:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107797464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775927515] [2021-06-05 22:19:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:03,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:03,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775927515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:03,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:03,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:19:03,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769372607] [2021-06-05 22:19:03,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:03,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:03,672 INFO L87 Difference]: Start difference. First operand 207 states and 535 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:04,776 INFO L93 Difference]: Finished difference Result 358 states and 789 transitions. [2021-06-05 22:19:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:19:04,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:04,777 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:19:04,777 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:19:04,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1164.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:19:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:19:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-06-05 22:19:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.603864734299517) internal successors, (539), 207 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 539 transitions. [2021-06-05 22:19:04,780 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 539 transitions. Word has length 18 [2021-06-05 22:19:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:04,780 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 539 transitions. [2021-06-05 22:19:04,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 539 transitions. [2021-06-05 22:19:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:04,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:04,780 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:04,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7334 [2021-06-05 22:19:04,981 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:04,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1440695546, now seen corresponding path program 317 times [2021-06-05 22:19:04,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:04,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015312887] [2021-06-05 22:19:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:05,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015312887] [2021-06-05 22:19:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015312887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215241144] [2021-06-05 22:19:05,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:05,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:19:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215241144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:19:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267918520] [2021-06-05 22:19:05,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:05,507 INFO L87 Difference]: Start difference. First operand 208 states and 539 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:06,277 INFO L93 Difference]: Finished difference Result 315 states and 721 transitions. [2021-06-05 22:19:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:06,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:06,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:06,278 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:19:06,278 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 22:19:06,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 22:19:06,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 202. [2021-06-05 22:19:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.5771144278606966) internal successors, (518), 201 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 518 transitions. [2021-06-05 22:19:06,281 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 518 transitions. Word has length 18 [2021-06-05 22:19:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:06,281 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 518 transitions. [2021-06-05 22:19:06,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:06,281 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 518 transitions. [2021-06-05 22:19:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:06,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:06,281 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:06,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7372,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:06,482 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash -34843612, now seen corresponding path program 318 times [2021-06-05 22:19:06,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:06,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015450528] [2021-06-05 22:19:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:06,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015450528] [2021-06-05 22:19:06,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015450528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:06,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215205316] [2021-06-05 22:19:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:06,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:19:06,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:06,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:06,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215205316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:06,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:06,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351196473] [2021-06-05 22:19:06,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:06,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:06,961 INFO L87 Difference]: Start difference. First operand 202 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:07,342 INFO L93 Difference]: Finished difference Result 327 states and 765 transitions. [2021-06-05 22:19:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:07,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:07,343 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:19:07,343 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 22:19:07,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 22:19:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2021-06-05 22:19:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 22:19:07,346 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 22:19:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:07,346 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 22:19:07,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 22:19:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:07,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:07,346 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:07,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7406 [2021-06-05 22:19:07,547 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:07,547 INFO L82 PathProgramCache]: Analyzing trace with hash -735336600, now seen corresponding path program 319 times [2021-06-05 22:19:07,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:07,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643827677] [2021-06-05 22:19:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:07,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643827677] [2021-06-05 22:19:07,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643827677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:07,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653558975] [2021-06-05 22:19:07,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653558975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:07,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:07,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394893896] [2021-06-05 22:19:07,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:07,997 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:08,287 INFO L93 Difference]: Finished difference Result 343 states and 790 transitions. [2021-06-05 22:19:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:08,288 INFO L225 Difference]: With dead ends: 343 [2021-06-05 22:19:08,288 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:19:08,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:19:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 225. [2021-06-05 22:19:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 22:19:08,291 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 22:19:08,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:08,291 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 22:19:08,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:08,291 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 22:19:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:08,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:08,291 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:08,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7441,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:08,492 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash 956248036, now seen corresponding path program 320 times [2021-06-05 22:19:08,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:08,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101778126] [2021-06-05 22:19:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:08,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101778126] [2021-06-05 22:19:08,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101778126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:08,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941854313] [2021-06-05 22:19:08,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:08,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:08,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941854313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:08,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:08,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:08,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155166806] [2021-06-05 22:19:08,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:08,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:08,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:08,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:08,901 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:09,181 INFO L93 Difference]: Finished difference Result 328 states and 767 transitions. [2021-06-05 22:19:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:09,181 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:19:09,181 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:19:09,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:19:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-06-05 22:19:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 22:19:09,184 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 22:19:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:09,184 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 22:19:09,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 22:19:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:09,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:09,185 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:09,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7488 [2021-06-05 22:19:09,385 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1270566402, now seen corresponding path program 321 times [2021-06-05 22:19:09,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:09,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874291638] [2021-06-05 22:19:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:09,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:09,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874291638] [2021-06-05 22:19:09,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874291638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:09,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185776565] [2021-06-05 22:19:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:09,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:19:09,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185776565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:09,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:09,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:09,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475248032] [2021-06-05 22:19:09,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:09,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:09,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:09,948 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:10,366 INFO L93 Difference]: Finished difference Result 336 states and 773 transitions. [2021-06-05 22:19:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:10,367 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:19:10,367 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:19:10,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:19:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2021-06-05 22:19:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 22:19:10,369 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 22:19:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:10,369 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 22:19:10,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 22:19:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:10,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:10,370 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:10,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7522 [2021-06-05 22:19:10,570 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:10,571 INFO L82 PathProgramCache]: Analyzing trace with hash 421018234, now seen corresponding path program 322 times [2021-06-05 22:19:10,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:10,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111099607] [2021-06-05 22:19:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:10,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:10,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111099607] [2021-06-05 22:19:10,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111099607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:10,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456155232] [2021-06-05 22:19:10,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:10,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456155232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:11,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:11,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:11,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273404435] [2021-06-05 22:19:11,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:11,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:11,144 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:11,615 INFO L93 Difference]: Finished difference Result 337 states and 773 transitions. [2021-06-05 22:19:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:11,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:11,616 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:19:11,616 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 22:19:11,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 22:19:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 224. [2021-06-05 22:19:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 22:19:11,618 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 22:19:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:11,619 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 22:19:11,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 22:19:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:11,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:11,619 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:11,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7641 [2021-06-05 22:19:11,819 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 594265926, now seen corresponding path program 323 times [2021-06-05 22:19:11,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:11,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409789922] [2021-06-05 22:19:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:11,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409789922] [2021-06-05 22:19:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409789922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:11,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179588541] [2021-06-05 22:19:11,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:11,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:19:11,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:12,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179588541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:12,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:12,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:12,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848938808] [2021-06-05 22:19:12,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:12,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:12,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:12,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:12,327 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:12,774 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2021-06-05 22:19:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:12,775 INFO L225 Difference]: With dead ends: 320 [2021-06-05 22:19:12,775 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 22:19:12,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 511.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:19:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 22:19:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-06-05 22:19:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 22:19:12,777 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 22:19:12,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:12,778 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 22:19:12,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 22:19:12,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:12,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:12,778 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:12,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:12,979 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:12,979 INFO L82 PathProgramCache]: Analyzing trace with hash -682821080, now seen corresponding path program 324 times [2021-06-05 22:19:12,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:12,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167845739] [2021-06-05 22:19:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:13,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167845739] [2021-06-05 22:19:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167845739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107696521] [2021-06-05 22:19:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:13,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:19:13,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:13,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107696521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:13,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:13,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:19:13,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192985623] [2021-06-05 22:19:13,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:13,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:13,789 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:14,257 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2021-06-05 22:19:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:19:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:14,258 INFO L225 Difference]: With dead ends: 294 [2021-06-05 22:19:14,258 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:19:14,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:19:14,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 222. [2021-06-05 22:19:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 22:19:14,261 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 22:19:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:14,261 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 22:19:14,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 22:19:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:14,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:14,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:14,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7840,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:14,462 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1008763556, now seen corresponding path program 325 times [2021-06-05 22:19:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:14,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780835169] [2021-06-05 22:19:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:14,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:14,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780835169] [2021-06-05 22:19:14,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780835169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:14,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177071070] [2021-06-05 22:19:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:15,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177071070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:15,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:15,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:19:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376541012] [2021-06-05 22:19:15,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:15,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:15,115 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:15,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:15,617 INFO L93 Difference]: Finished difference Result 295 states and 697 transitions. [2021-06-05 22:19:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:19:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:15,618 INFO L225 Difference]: With dead ends: 295 [2021-06-05 22:19:15,618 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 22:19:15,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 22:19:15,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 221. [2021-06-05 22:19:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6227272727272726) internal successors, (577), 220 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 577 transitions. [2021-06-05 22:19:15,621 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 577 transitions. Word has length 18 [2021-06-05 22:19:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:15,621 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 577 transitions. [2021-06-05 22:19:15,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 577 transitions. [2021-06-05 22:19:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:15,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:15,621 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:15,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8005 [2021-06-05 22:19:15,822 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1182011248, now seen corresponding path program 326 times [2021-06-05 22:19:15,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:15,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522053667] [2021-06-05 22:19:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:16,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:16,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522053667] [2021-06-05 22:19:16,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522053667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:16,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197639964] [2021-06-05 22:19:16,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:16,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:16,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:16,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:16,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197639964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:16,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:16,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 22:19:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434972265] [2021-06-05 22:19:16,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:16,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:16,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:16,615 INFO L87 Difference]: Start difference. First operand 221 states and 577 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:17,456 INFO L93 Difference]: Finished difference Result 320 states and 732 transitions. [2021-06-05 22:19:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:17,457 INFO L225 Difference]: With dead ends: 320 [2021-06-05 22:19:17,457 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 22:19:17,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1047.0ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:19:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 22:19:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 219. [2021-06-05 22:19:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.614678899082569) internal successors, (570), 218 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 570 transitions. [2021-06-05 22:19:17,460 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 570 transitions. Word has length 18 [2021-06-05 22:19:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:17,460 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 570 transitions. [2021-06-05 22:19:17,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 570 transitions. [2021-06-05 22:19:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:17,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:17,460 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:17,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8123,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:17,661 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2037244892, now seen corresponding path program 327 times [2021-06-05 22:19:17,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:17,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876125777] [2021-06-05 22:19:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:17,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:17,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876125777] [2021-06-05 22:19:17,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876125777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:17,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659977607] [2021-06-05 22:19:17,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:17,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:19:17,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:18,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659977607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:18,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:18,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:18,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862997944] [2021-06-05 22:19:18,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:18,204 INFO L87 Difference]: Start difference. First operand 219 states and 570 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:18,695 INFO L93 Difference]: Finished difference Result 294 states and 689 transitions. [2021-06-05 22:19:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:18,696 INFO L225 Difference]: With dead ends: 294 [2021-06-05 22:19:18,696 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:19:18,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:18,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:19:18,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-06-05 22:19:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.604651162790698) internal successors, (560), 215 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 560 transitions. [2021-06-05 22:19:18,698 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 560 transitions. Word has length 18 [2021-06-05 22:19:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:18,698 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 560 transitions. [2021-06-05 22:19:18,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 560 transitions. [2021-06-05 22:19:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:18,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:18,699 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:18,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8210 [2021-06-05 22:19:18,899 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash 357414718, now seen corresponding path program 328 times [2021-06-05 22:19:18,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:18,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443790277] [2021-06-05 22:19:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:19,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:19,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443790277] [2021-06-05 22:19:19,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443790277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:19,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571622680] [2021-06-05 22:19:19,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:19,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571622680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:19,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:19,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:19:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033599768] [2021-06-05 22:19:19,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:19,628 INFO L87 Difference]: Start difference. First operand 216 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:20,155 INFO L93 Difference]: Finished difference Result 342 states and 778 transitions. [2021-06-05 22:19:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:20,156 INFO L225 Difference]: With dead ends: 342 [2021-06-05 22:19:20,156 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:19:20,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:19:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:19:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 226. [2021-06-05 22:19:20,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.64) internal successors, (594), 225 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 594 transitions. [2021-06-05 22:19:20,158 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 594 transitions. Word has length 18 [2021-06-05 22:19:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:20,158 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 594 transitions. [2021-06-05 22:19:20,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 594 transitions. [2021-06-05 22:19:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:20,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:20,159 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:20,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8286 [2021-06-05 22:19:20,359 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2048999354, now seen corresponding path program 329 times [2021-06-05 22:19:20,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:20,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885401988] [2021-06-05 22:19:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:20,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885401988] [2021-06-05 22:19:20,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885401988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:20,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088295869] [2021-06-05 22:19:20,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:20,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:19:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:20,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:21,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088295869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:21,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:21,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:19:21,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887075855] [2021-06-05 22:19:21,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:21,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:21,028 INFO L87 Difference]: Start difference. First operand 226 states and 594 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:21,530 INFO L93 Difference]: Finished difference Result 346 states and 783 transitions. [2021-06-05 22:19:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:21,531 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:19:21,531 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:19:21,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:19:21,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 225. [2021-06-05 22:19:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6339285714285716) internal successors, (590), 224 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 590 transitions. [2021-06-05 22:19:21,534 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 590 transitions. Word has length 18 [2021-06-05 22:19:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:21,534 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 590 transitions. [2021-06-05 22:19:21,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 590 transitions. [2021-06-05 22:19:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:21,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:21,534 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:21,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8443 [2021-06-05 22:19:21,735 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2072720250, now seen corresponding path program 330 times [2021-06-05 22:19:21,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:21,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020650700] [2021-06-05 22:19:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:21,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020650700] [2021-06-05 22:19:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020650700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583617251] [2021-06-05 22:19:21,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:22,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:19:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:22,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583617251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:22,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:22,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:19:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605420557] [2021-06-05 22:19:22,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:22,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:22,466 INFO L87 Difference]: Start difference. First operand 225 states and 590 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:23,094 INFO L93 Difference]: Finished difference Result 357 states and 795 transitions. [2021-06-05 22:19:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:19:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:23,095 INFO L225 Difference]: With dead ends: 357 [2021-06-05 22:19:23,095 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 22:19:23,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 748.5ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:19:23,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 22:19:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2021-06-05 22:19:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.626126126126126) internal successors, (583), 222 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 583 transitions. [2021-06-05 22:19:23,098 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 583 transitions. Word has length 18 [2021-06-05 22:19:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:23,098 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 583 transitions. [2021-06-05 22:19:23,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 583 transitions. [2021-06-05 22:19:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:23,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:23,099 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:23,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8563,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:23,299 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash -997009094, now seen corresponding path program 331 times [2021-06-05 22:19:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:23,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897164598] [2021-06-05 22:19:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:23,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:23,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897164598] [2021-06-05 22:19:23,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897164598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:23,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940305902] [2021-06-05 22:19:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:24,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940305902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:24,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:24,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:19:24,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831961337] [2021-06-05 22:19:24,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:24,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:24,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:24,245 INFO L87 Difference]: Start difference. First operand 223 states and 583 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:24,770 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 22:19:24,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:24,948 INFO L93 Difference]: Finished difference Result 242 states and 611 transitions. [2021-06-05 22:19:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:19:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:24,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:24,949 INFO L225 Difference]: With dead ends: 242 [2021-06-05 22:19:24,949 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 22:19:24,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1171.2ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 22:19:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2021-06-05 22:19:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6244343891402715) internal successors, (580), 221 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 580 transitions. [2021-06-05 22:19:24,951 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 580 transitions. Word has length 18 [2021-06-05 22:19:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:24,952 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 580 transitions. [2021-06-05 22:19:24,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 580 transitions. [2021-06-05 22:19:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:24,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:24,952 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8659,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:25,153 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2009701626, now seen corresponding path program 332 times [2021-06-05 22:19:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864307047] [2021-06-05 22:19:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:25,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:25,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864307047] [2021-06-05 22:19:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864307047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:25,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016789202] [2021-06-05 22:19:25,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:25,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:25,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016789202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:25,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:25,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:19:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521933523] [2021-06-05 22:19:25,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:25,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:25,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:25,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:25,802 INFO L87 Difference]: Start difference. First operand 222 states and 580 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:26,195 INFO L93 Difference]: Finished difference Result 320 states and 730 transitions. [2021-06-05 22:19:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:26,196 INFO L225 Difference]: With dead ends: 320 [2021-06-05 22:19:26,196 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 22:19:26,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:19:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 22:19:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 230. [2021-06-05 22:19:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 22:19:26,199 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 22:19:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:26,200 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 22:19:26,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 22:19:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:26,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:26,200 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:26,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8692,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:26,422 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash 923469522, now seen corresponding path program 333 times [2021-06-05 22:19:26,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:26,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607795151] [2021-06-05 22:19:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:26,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607795151] [2021-06-05 22:19:26,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607795151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936827077] [2021-06-05 22:19:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:26,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:19:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:26,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:27,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936827077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:27,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:27,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:19:27,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939095934] [2021-06-05 22:19:27,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:27,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:27,039 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:27,440 INFO L93 Difference]: Finished difference Result 363 states and 828 transitions. [2021-06-05 22:19:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:27,441 INFO L225 Difference]: With dead ends: 363 [2021-06-05 22:19:27,441 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 22:19:27,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 22:19:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 243. [2021-06-05 22:19:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6198347107438016) internal successors, (634), 242 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:27,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 634 transitions. [2021-06-05 22:19:27,443 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 634 transitions. Word has length 18 [2021-06-05 22:19:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:27,444 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 634 transitions. [2021-06-05 22:19:27,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:27,444 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 634 transitions. [2021-06-05 22:19:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:27,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:27,444 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:27,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-06-05 22:19:27,644 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2059573526, now seen corresponding path program 334 times [2021-06-05 22:19:27,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:27,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119325613] [2021-06-05 22:19:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:27,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119325613] [2021-06-05 22:19:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119325613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017646017] [2021-06-05 22:19:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:27,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:27,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:28,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017646017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:28,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:28,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:19:28,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8986137] [2021-06-05 22:19:28,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:28,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:28,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:28,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:28,318 INFO L87 Difference]: Start difference. First operand 243 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:28,734 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-05 22:19:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:29,177 INFO L93 Difference]: Finished difference Result 411 states and 910 transitions. [2021-06-05 22:19:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:19:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:29,178 INFO L225 Difference]: With dead ends: 411 [2021-06-05 22:19:29,178 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:19:29,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 960.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:19:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:19:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 22:19:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 22:19:29,181 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 22:19:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:29,181 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 22:19:29,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 22:19:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:29,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:29,181 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:29,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8836 [2021-06-05 22:19:29,382 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:29,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:29,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1819127378, now seen corresponding path program 335 times [2021-06-05 22:19:29,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:29,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089782134] [2021-06-05 22:19:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089782134] [2021-06-05 22:19:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089782134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104498001] [2021-06-05 22:19:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:29,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:19:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:30,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104498001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:30,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:30,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:19:30,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941463539] [2021-06-05 22:19:30,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:30,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:30,215 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:31,210 INFO L93 Difference]: Finished difference Result 415 states and 922 transitions. [2021-06-05 22:19:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:19:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:31,211 INFO L225 Difference]: With dead ends: 415 [2021-06-05 22:19:31,211 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:19:31,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1122.1ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:19:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:19:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 248. [2021-06-05 22:19:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 22:19:31,214 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 22:19:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:31,214 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 22:19:31,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 22:19:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:31,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:31,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:31,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8912,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:31,415 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1118634390, now seen corresponding path program 336 times [2021-06-05 22:19:31,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:31,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961849371] [2021-06-05 22:19:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:31,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961849371] [2021-06-05 22:19:31,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961849371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682961273] [2021-06-05 22:19:31,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:31,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:19:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:32,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:19:32,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:32,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:19:32,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:19:32,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:19:32,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:32,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:32,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:32,151 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:19:32,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:19:32,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:19:32,172 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:32,177 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:19:32,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:32,191 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:19:32,197 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:32,203 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:19:32,209 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:32,215 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:32,351 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-06-05 22:19:32,352 INFO L628 ElimStorePlain]: treesize reduction 404, result has 19.4 percent of original size [2021-06-05 22:19:32,352 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:19:32,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:19:32,354 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 6 variables, input treesize:1057, output treesize:85 [2021-06-05 22:19:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:32,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682961273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:32,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:32,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:19:32,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796396403] [2021-06-05 22:19:32,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:32,527 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:33,221 INFO L93 Difference]: Finished difference Result 412 states and 942 transitions. [2021-06-05 22:19:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:33,222 INFO L225 Difference]: With dead ends: 412 [2021-06-05 22:19:33,222 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 22:19:33,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1016.8ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:19:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 22:19:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 262. [2021-06-05 22:19:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.67816091954023) internal successors, (699), 261 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 699 transitions. [2021-06-05 22:19:33,225 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 699 transitions. Word has length 18 [2021-06-05 22:19:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:33,225 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 699 transitions. [2021-06-05 22:19:33,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 699 transitions. [2021-06-05 22:19:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:33,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:33,225 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:33,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9024 [2021-06-05 22:19:33,426 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748270, now seen corresponding path program 337 times [2021-06-05 22:19:33,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:33,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795937493] [2021-06-05 22:19:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:33,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795937493] [2021-06-05 22:19:33,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795937493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:33,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236031440] [2021-06-05 22:19:33,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:33,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:34,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236031440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:34,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:34,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:19:34,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530169002] [2021-06-05 22:19:34,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:34,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:34,168 INFO L87 Difference]: Start difference. First operand 262 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:34,796 INFO L93 Difference]: Finished difference Result 411 states and 940 transitions. [2021-06-05 22:19:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:34,797 INFO L225 Difference]: With dead ends: 411 [2021-06-05 22:19:34,797 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:19:34,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:19:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 22:19:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 22:19:34,800 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 22:19:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:34,800 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 22:19:34,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 22:19:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:34,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:34,800 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:35,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9040 [2021-06-05 22:19:35,001 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1548351786, now seen corresponding path program 338 times [2021-06-05 22:19:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:35,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276125140] [2021-06-05 22:19:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:35,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276125140] [2021-06-05 22:19:35,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276125140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:35,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126534758] [2021-06-05 22:19:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:35,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:35,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126534758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:35,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:35,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:19:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484632795] [2021-06-05 22:19:35,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:35,691 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:36,348 INFO L93 Difference]: Finished difference Result 359 states and 837 transitions. [2021-06-05 22:19:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:36,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:36,349 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:19:36,349 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:19:36,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 657.3ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:19:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 248. [2021-06-05 22:19:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 22:19:36,351 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 22:19:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:36,351 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 22:19:36,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 22:19:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:36,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:36,352 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:36,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9193,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:36,552 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2083581588, now seen corresponding path program 339 times [2021-06-05 22:19:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:36,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879167461] [2021-06-05 22:19:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:36,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879167461] [2021-06-05 22:19:36,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879167461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:36,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937795897] [2021-06-05 22:19:36,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:36,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:19:36,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:36,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937795897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:36,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:36,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:36,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277102872] [2021-06-05 22:19:36,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:36,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:36,997 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:37,281 INFO L93 Difference]: Finished difference Result 353 states and 827 transitions. [2021-06-05 22:19:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:37,282 INFO L225 Difference]: With dead ends: 353 [2021-06-05 22:19:37,282 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 22:19:37,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 22:19:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 251. [2021-06-05 22:19:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.648) internal successors, (662), 250 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 662 transitions. [2021-06-05 22:19:37,288 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 662 transitions. Word has length 18 [2021-06-05 22:19:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:37,288 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 662 transitions. [2021-06-05 22:19:37,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 662 transitions. [2021-06-05 22:19:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:37,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:37,289 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:37,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9342 [2021-06-05 22:19:37,493 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:37,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -391996952, now seen corresponding path program 340 times [2021-06-05 22:19:37,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:37,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97429497] [2021-06-05 22:19:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:37,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97429497] [2021-06-05 22:19:37,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97429497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32501354] [2021-06-05 22:19:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:37,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:37,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:37,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32501354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:37,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:37,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:37,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673772221] [2021-06-05 22:19:37,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:37,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:37,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:37,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:37,908 INFO L87 Difference]: Start difference. First operand 251 states and 662 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:38,181 INFO L93 Difference]: Finished difference Result 355 states and 829 transitions. [2021-06-05 22:19:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:38,182 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:19:38,182 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:19:38,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:38,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:19:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2021-06-05 22:19:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.642570281124498) internal successors, (658), 249 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 658 transitions. [2021-06-05 22:19:38,185 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 658 transitions. Word has length 18 [2021-06-05 22:19:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:38,185 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 658 transitions. [2021-06-05 22:19:38,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 658 transitions. [2021-06-05 22:19:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:38,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:38,186 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:38,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9377,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:38,386 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash -218749260, now seen corresponding path program 341 times [2021-06-05 22:19:38,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:38,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728999683] [2021-06-05 22:19:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728999683] [2021-06-05 22:19:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728999683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107660493] [2021-06-05 22:19:38,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:38,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:19:38,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:38,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:38,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:38,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107660493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:38,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:38,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:38,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669230443] [2021-06-05 22:19:38,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:38,855 INFO L87 Difference]: Start difference. First operand 250 states and 658 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:39,209 INFO L93 Difference]: Finished difference Result 338 states and 801 transitions. [2021-06-05 22:19:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:19:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:39,210 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:19:39,210 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 22:19:39,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 22:19:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 233. [2021-06-05 22:19:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5948275862068964) internal successors, (602), 232 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 602 transitions. [2021-06-05 22:19:39,213 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 602 transitions. Word has length 18 [2021-06-05 22:19:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:39,213 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 602 transitions. [2021-06-05 22:19:39,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 602 transitions. [2021-06-05 22:19:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:39,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:39,213 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:39,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9411 [2021-06-05 22:19:39,414 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:39,414 INFO L82 PathProgramCache]: Analyzing trace with hash 46441558, now seen corresponding path program 342 times [2021-06-05 22:19:39,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:39,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739446337] [2021-06-05 22:19:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739446337] [2021-06-05 22:19:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739446337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440565336] [2021-06-05 22:19:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:39,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:19:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:39,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:40,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440565336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:40,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:40,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:19:40,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217733113] [2021-06-05 22:19:40,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:19:40,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:40,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:19:40,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:19:40,106 INFO L87 Difference]: Start difference. First operand 233 states and 602 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:40,603 INFO L93 Difference]: Finished difference Result 324 states and 767 transitions. [2021-06-05 22:19:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:40,604 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:19:40,604 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:19:40,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:19:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-06-05 22:19:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2021-06-05 22:19:40,606 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 18 [2021-06-05 22:19:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:40,606 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2021-06-05 22:19:40,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2021-06-05 22:19:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:40,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:40,607 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:40,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9445 [2021-06-05 22:19:40,807 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1920051630, now seen corresponding path program 343 times [2021-06-05 22:19:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:40,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455083210] [2021-06-05 22:19:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:40,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455083210] [2021-06-05 22:19:40,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455083210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:40,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179619987] [2021-06-05 22:19:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:41,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179619987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:41,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:41,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650406070] [2021-06-05 22:19:41,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:41,316 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:41,740 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-06-05 22:19:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:19:41,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:41,741 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:19:41,741 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:19:41,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 509.1ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:19:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:19:41,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 248. [2021-06-05 22:19:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 22:19:41,744 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 22:19:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 22:19:41,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 22:19:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:41,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:41,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:41,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9616,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:41,945 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1674422678, now seen corresponding path program 344 times [2021-06-05 22:19:41,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:41,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171967084] [2021-06-05 22:19:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:42,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171967084] [2021-06-05 22:19:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171967084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:42,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027568190] [2021-06-05 22:19:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:42,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:42,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:42,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027568190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:42,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:42,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 22:19:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364622023] [2021-06-05 22:19:42,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:42,683 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:43,455 INFO L93 Difference]: Finished difference Result 369 states and 848 transitions. [2021-06-05 22:19:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:43,456 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:19:43,456 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 22:19:43,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 782.4ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:19:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 22:19:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2021-06-05 22:19:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 22:19:43,459 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 22:19:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:43,459 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 22:19:43,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 22:19:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:43,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:43,460 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:43,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9698 [2021-06-05 22:19:43,660 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:43,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -928959982, now seen corresponding path program 345 times [2021-06-05 22:19:43,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:43,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680740647] [2021-06-05 22:19:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:43,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:43,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680740647] [2021-06-05 22:19:43,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680740647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:43,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644425] [2021-06-05 22:19:43,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:43,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:19:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:44,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:44,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:44,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:19:44,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508902660] [2021-06-05 22:19:44,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:44,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:44,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:44,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:44,269 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:44,751 INFO L93 Difference]: Finished difference Result 329 states and 785 transitions. [2021-06-05 22:19:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:19:44,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:44,752 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:19:44,752 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 22:19:44,752 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:44,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 22:19:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 248. [2021-06-05 22:19:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 22:19:44,755 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 22:19:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:44,755 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 22:19:44,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 22:19:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:44,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:44,755 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:44,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:44,956 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1139192876, now seen corresponding path program 346 times [2021-06-05 22:19:44,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:44,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683832102] [2021-06-05 22:19:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:45,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683832102] [2021-06-05 22:19:45,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683832102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:45,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990701093] [2021-06-05 22:19:45,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:45,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:45,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990701093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:45,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:45,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:45,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839347029] [2021-06-05 22:19:45,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:45,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:45,412 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:45,852 INFO L93 Difference]: Finished difference Result 326 states and 778 transitions. [2021-06-05 22:19:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:19:45,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:45,853 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:19:45,853 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 22:19:45,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:19:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 22:19:45,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 248. [2021-06-05 22:19:45,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 22:19:45,855 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 22:19:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:45,856 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 22:19:45,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 22:19:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:45,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:45,856 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:46,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9988 [2021-06-05 22:19:46,056 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:46,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:46,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1464189784, now seen corresponding path program 347 times [2021-06-05 22:19:46,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:46,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970349344] [2021-06-05 22:19:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:46,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:46,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970349344] [2021-06-05 22:19:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970349344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:46,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735186598] [2021-06-05 22:19:46,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:46,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:19:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:46,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735186598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:46,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:46,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:19:46,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857609097] [2021-06-05 22:19:46,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:46,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:46,559 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:47,057 INFO L93 Difference]: Finished difference Result 327 states and 778 transitions. [2021-06-05 22:19:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:19:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:47,058 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:19:47,058 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 22:19:47,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:19:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 22:19:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2021-06-05 22:19:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6178861788617884) internal successors, (644), 246 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 644 transitions. [2021-06-05 22:19:47,060 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 644 transitions. Word has length 18 [2021-06-05 22:19:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:47,060 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 644 transitions. [2021-06-05 22:19:47,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 644 transitions. [2021-06-05 22:19:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:47,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:47,061 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:47,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 22:19:47,261 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1290942092, now seen corresponding path program 348 times [2021-06-05 22:19:47,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:47,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679956060] [2021-06-05 22:19:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:19:47,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:47,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679956060] [2021-06-05 22:19:47,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679956060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:47,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707536397] [2021-06-05 22:19:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:47,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:19:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707536397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:47,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:47,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:19:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635769296] [2021-06-05 22:19:47,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:47,968 INFO L87 Difference]: Start difference. First operand 247 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:48,544 INFO L93 Difference]: Finished difference Result 317 states and 758 transitions. [2021-06-05 22:19:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:48,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:48,545 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:19:48,545 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:19:48,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:19:48,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2021-06-05 22:19:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.610655737704918) internal successors, (637), 244 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 637 transitions. [2021-06-05 22:19:48,548 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 637 transitions. Word has length 18 [2021-06-05 22:19:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:48,548 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 637 transitions. [2021-06-05 22:19:48,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 637 transitions. [2021-06-05 22:19:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:48,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:48,548 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:48,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10057,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:48,753 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1726938198, now seen corresponding path program 349 times [2021-06-05 22:19:48,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:48,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783853392] [2021-06-05 22:19:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:48,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783853392] [2021-06-05 22:19:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783853392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069680445] [2021-06-05 22:19:48,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069680445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:49,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:49,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:19:49,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979037832] [2021-06-05 22:19:49,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:19:49,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:19:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:19:49,205 INFO L87 Difference]: Start difference. First operand 245 states and 637 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:49,656 INFO L93 Difference]: Finished difference Result 364 states and 845 transitions. [2021-06-05 22:19:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:19:49,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:49,657 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:19:49,657 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:19:49,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:19:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 251. [2021-06-05 22:19:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 22:19:49,660 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 22:19:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:49,660 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 22:19:49,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 22:19:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:49,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:49,660 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:49,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10151,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:49,861 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash -876444462, now seen corresponding path program 350 times [2021-06-05 22:19:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:49,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414293898] [2021-06-05 22:19:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:50,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414293898] [2021-06-05 22:19:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414293898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013282581] [2021-06-05 22:19:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:50,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:50,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013282581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:50,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:50,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 22:19:50,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980465154] [2021-06-05 22:19:50,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:19:50,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:19:50,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:19:50,595 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:51,420 INFO L93 Difference]: Finished difference Result 392 states and 887 transitions. [2021-06-05 22:19:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:19:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:51,421 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:19:51,421 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:19:51,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:19:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:19:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 250. [2021-06-05 22:19:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 22:19:51,424 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 22:19:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:51,424 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 22:19:51,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 22:19:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:51,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:51,424 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:51,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10185,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:51,625 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash -703196770, now seen corresponding path program 351 times [2021-06-05 22:19:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498520990] [2021-06-05 22:19:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:51,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:51,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498520990] [2021-06-05 22:19:51,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498520990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:51,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402485499] [2021-06-05 22:19:51,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:51,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:19:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:52,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402485499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:52,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:52,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:52,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775931221] [2021-06-05 22:19:52,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:52,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:52,167 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:52,732 INFO L93 Difference]: Finished difference Result 360 states and 831 transitions. [2021-06-05 22:19:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:52,733 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:19:52,733 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 22:19:52,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:19:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 22:19:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 246. [2021-06-05 22:19:52,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6122448979591835) internal successors, (640), 245 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 640 transitions. [2021-06-05 22:19:52,736 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 640 transitions. Word has length 18 [2021-06-05 22:19:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:52,736 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 640 transitions. [2021-06-05 22:19:52,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 640 transitions. [2021-06-05 22:19:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:52,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:52,736 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-06-05 22:19:52,937 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:52,937 INFO L82 PathProgramCache]: Analyzing trace with hash 372514386, now seen corresponding path program 352 times [2021-06-05 22:19:52,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769105206] [2021-06-05 22:19:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:53,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:53,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769105206] [2021-06-05 22:19:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769105206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391560218] [2021-06-05 22:19:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:53,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:19:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:53,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391560218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:53,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:53,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:53,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071924668] [2021-06-05 22:19:53,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:53,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:53,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:53,450 INFO L87 Difference]: Start difference. First operand 246 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:53,874 INFO L93 Difference]: Finished difference Result 336 states and 787 transitions. [2021-06-05 22:19:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:19:53,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:53,875 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:19:53,875 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:19:53,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:19:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:19:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 238. [2021-06-05 22:19:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2021-06-05 22:19:53,878 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 18 [2021-06-05 22:19:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:53,878 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2021-06-05 22:19:53,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2021-06-05 22:19:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:53,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:53,878 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:54,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 22:19:54,079 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -73397396, now seen corresponding path program 353 times [2021-06-05 22:19:54,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:54,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859090001] [2021-06-05 22:19:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:54,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859090001] [2021-06-05 22:19:54,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859090001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:54,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729788784] [2021-06-05 22:19:54,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:54,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:19:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729788784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815660651] [2021-06-05 22:19:54,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:54,634 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:55,024 INFO L93 Difference]: Finished difference Result 356 states and 834 transitions. [2021-06-05 22:19:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:19:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:55,025 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:19:55,025 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 22:19:55,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:19:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 22:19:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 248. [2021-06-05 22:19:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.619433198380567) internal successors, (647), 247 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 647 transitions. [2021-06-05 22:19:55,028 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 647 transitions. Word has length 18 [2021-06-05 22:19:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:55,028 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 647 transitions. [2021-06-05 22:19:55,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 647 transitions. [2021-06-05 22:19:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:55,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:55,028 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:55,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-06-05 22:19:55,229 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:55,229 INFO L82 PathProgramCache]: Analyzing trace with hash -313843544, now seen corresponding path program 354 times [2021-06-05 22:19:55,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:55,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460959598] [2021-06-05 22:19:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:55,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460959598] [2021-06-05 22:19:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460959598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518056706] [2021-06-05 22:19:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:55,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:19:55,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:55,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:19:55,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518056706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:55,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:19:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288138698] [2021-06-05 22:19:55,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:19:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:19:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:19:55,794 INFO L87 Difference]: Start difference. First operand 248 states and 647 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:56,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:56,426 INFO L93 Difference]: Finished difference Result 372 states and 865 transitions. [2021-06-05 22:19:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:19:56,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:56,427 INFO L225 Difference]: With dead ends: 372 [2021-06-05 22:19:56,427 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 22:19:56,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:19:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 22:19:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 250. [2021-06-05 22:19:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 22:19:56,431 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 22:19:56,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:56,431 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 22:19:56,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 22:19:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:56,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:56,432 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:56,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:56,645 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:56,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1014336532, now seen corresponding path program 355 times [2021-06-05 22:19:56,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:56,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416342581] [2021-06-05 22:19:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:56,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416342581] [2021-06-05 22:19:56,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416342581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039695068] [2021-06-05 22:19:56,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:19:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:57,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039695068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:57,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:57,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:19:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076170141] [2021-06-05 22:19:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:57,510 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:19:58,575 INFO L93 Difference]: Finished difference Result 408 states and 928 transitions. [2021-06-05 22:19:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:19:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:19:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:19:58,576 INFO L225 Difference]: With dead ends: 408 [2021-06-05 22:19:58,576 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:19:58,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1185.1ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:19:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:19:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-06-05 22:19:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 22:19:58,579 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 22:19:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:19:58,579 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 22:19:58,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:19:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 22:19:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:19:58,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:19:58,579 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:19:58,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-06-05 22:19:58,780 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:19:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:19:58,780 INFO L82 PathProgramCache]: Analyzing trace with hash 677248104, now seen corresponding path program 356 times [2021-06-05 22:19:58,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:19:58,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070797230] [2021-06-05 22:19:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:19:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:19:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:58,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:19:58,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070797230] [2021-06-05 22:19:58,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070797230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:58,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537793096] [2021-06-05 22:19:58,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:19:58,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:19:58,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:19:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:19:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:19:59,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:19:59,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:19:59,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 22:19:59,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:59,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:59,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 22:19:59,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 22:19:59,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 22:19:59,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 22:19:59,443 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,456 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:59,463 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:19:59,469 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:19:59,475 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,481 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,488 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,494 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:19:59,500 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:19:59,506 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 22:19:59,513 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:59,518 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,524 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,530 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:19:59,536 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,542 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 22:19:59,548 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,557 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 22:19:59,562 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,568 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,573 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,579 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:19:59,585 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:19:59,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:19:59,591 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:19:59,595 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 22:19:59,708 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-06-05 22:19:59,709 INFO L628 ElimStorePlain]: treesize reduction 668, result has 10.6 percent of original size [2021-06-05 22:19:59,709 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:19:59,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:19:59,710 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-06-05 22:19:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:19:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537793096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:19:59,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:19:59,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:19:59,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638537597] [2021-06-05 22:19:59,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:19:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:19:59,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:19:59,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:19:59,890 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:01,010 INFO L93 Difference]: Finished difference Result 375 states and 877 transitions. [2021-06-05 22:20:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:20:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:01,011 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:20:01,011 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:20:01,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1132.5ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:20:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:20:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-06-05 22:20:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 22:20:01,014 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 22:20:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:01,014 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 22:20:01,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 22:20:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:01,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:01,014 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:01,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10599,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:01,215 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:01,215 INFO L82 PathProgramCache]: Analyzing trace with hash -798291054, now seen corresponding path program 357 times [2021-06-05 22:20:01,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:01,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053347154] [2021-06-05 22:20:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:01,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053347154] [2021-06-05 22:20:01,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053347154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:01,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243082680] [2021-06-05 22:20:01,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:01,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:20:01,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:01,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:01,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:01,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:01,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:01,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:01,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:01,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:20:01,909 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:20:01,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:20:01,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:01,947 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:20:01,953 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:20:01,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:20:01,964 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:01,969 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:01,974 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:20:01,979 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:01,984 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:01,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:01,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:20:01,989 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:02,085 INFO L628 ElimStorePlain]: treesize reduction 384, result has 17.2 percent of original size [2021-06-05 22:20:02,086 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:02,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:20:02,087 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:1003, output treesize:86 [2021-06-05 22:20:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:02,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243082680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:02,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:02,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:20:02,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659260894] [2021-06-05 22:20:02,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:02,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:02,191 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:02,620 INFO L93 Difference]: Finished difference Result 368 states and 863 transitions. [2021-06-05 22:20:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:20:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:02,621 INFO L225 Difference]: With dead ends: 368 [2021-06-05 22:20:02,621 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:20:02,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:20:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 252. [2021-06-05 22:20:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 22:20:02,623 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 22:20:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:02,623 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 22:20:02,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 22:20:02,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:02,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:02,624 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:02,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10707,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:02,824 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1498784042, now seen corresponding path program 358 times [2021-06-05 22:20:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:02,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437220640] [2021-06-05 22:20:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:02,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:02,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437220640] [2021-06-05 22:20:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437220640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753782941] [2021-06-05 22:20:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:02,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:02,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:02,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:02,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:03,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753782941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:03,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:03,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:20:03,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786007300] [2021-06-05 22:20:03,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:03,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:03,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:03,509 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:03,846 INFO L93 Difference]: Finished difference Result 375 states and 874 transitions. [2021-06-05 22:20:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:20:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:03,847 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:20:03,847 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:20:03,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:20:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 22:20:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 22:20:03,850 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 22:20:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:03,850 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 22:20:03,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 22:20:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:03,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:03,850 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:04,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10832,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:04,051 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash 192800594, now seen corresponding path program 359 times [2021-06-05 22:20:04,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:04,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162944337] [2021-06-05 22:20:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:04,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162944337] [2021-06-05 22:20:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162944337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106904864] [2021-06-05 22:20:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:04,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:20:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:04,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106904864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:04,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:04,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:20:04,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454048011] [2021-06-05 22:20:04,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:04,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:04,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:04,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:04,691 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:05,046 INFO L93 Difference]: Finished difference Result 360 states and 851 transitions. [2021-06-05 22:20:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:20:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:05,047 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:20:05,048 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 22:20:05,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 22:20:05,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 250. [2021-06-05 22:20:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 22:20:05,051 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 22:20:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:05,052 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 22:20:05,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 22:20:05,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:05,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:05,052 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:05,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11004 [2021-06-05 22:20:05,275 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2034013844, now seen corresponding path program 360 times [2021-06-05 22:20:05,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:05,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236345237] [2021-06-05 22:20:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:05,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:05,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236345237] [2021-06-05 22:20:05,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236345237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:05,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231883608] [2021-06-05 22:20:05,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:05,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:20:05,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231883608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:05,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:05,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 22:20:05,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484246649] [2021-06-05 22:20:05,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:05,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:05,717 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:06,154 INFO L93 Difference]: Finished difference Result 365 states and 851 transitions. [2021-06-05 22:20:06,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:20:06,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:06,155 INFO L225 Difference]: With dead ends: 365 [2021-06-05 22:20:06,155 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 22:20:06,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 22:20:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 253. [2021-06-05 22:20:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 22:20:06,159 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 22:20:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:06,159 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 22:20:06,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 22:20:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:06,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:06,159 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:06,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11148 [2021-06-05 22:20:06,360 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -342429208, now seen corresponding path program 361 times [2021-06-05 22:20:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:06,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152177284] [2021-06-05 22:20:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:06,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:06,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152177284] [2021-06-05 22:20:06,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152177284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012001466] [2021-06-05 22:20:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:06,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012001466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:06,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:06,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 22:20:07,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591873558] [2021-06-05 22:20:07,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:07,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:07,005 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:07,551 INFO L93 Difference]: Finished difference Result 366 states and 851 transitions. [2021-06-05 22:20:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:20:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:07,552 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:20:07,552 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:20:07,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:20:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 252. [2021-06-05 22:20:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 22:20:07,555 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 22:20:07,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:07,555 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 22:20:07,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:07,555 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 22:20:07,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:07,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:07,556 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:07,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11184,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:07,756 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:07,757 INFO L82 PathProgramCache]: Analyzing trace with hash -169181516, now seen corresponding path program 362 times [2021-06-05 22:20:07,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:07,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840204874] [2021-06-05 22:20:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:07,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:07,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840204874] [2021-06-05 22:20:07,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840204874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:07,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716462870] [2021-06-05 22:20:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:07,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:07,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:07,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:08,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:08,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:08,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:08,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:08,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:08,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:08,451 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,661 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 22:20:08,662 INFO L628 ElimStorePlain]: treesize reduction 915, result has 11.9 percent of original size [2021-06-05 22:20:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:08,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:20:08,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:08,710 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 22:20:08,710 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:08,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:08,714 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:08,754 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 22:20:08,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:08,758 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:08,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:08,797 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-05 22:20:08,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:08,798 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:20:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:08,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716462870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:08,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:08,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 22:20:08,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915967560] [2021-06-05 22:20:08,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:08,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:08,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:08,908 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:09,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-06-05 22:20:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:09,584 INFO L93 Difference]: Finished difference Result 358 states and 837 transitions. [2021-06-05 22:20:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:09,585 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:20:09,585 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:20:09,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:20:09,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 250. [2021-06-05 22:20:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 22:20:09,588 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 22:20:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:09,588 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 22:20:09,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 22:20:09,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:09,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:09,590 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:09,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11221 [2021-06-05 22:20:09,793 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:09,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:09,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1446268522, now seen corresponding path program 363 times [2021-06-05 22:20:09,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:09,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759199517] [2021-06-05 22:20:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:10,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:10,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759199517] [2021-06-05 22:20:10,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759199517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:10,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143398318] [2021-06-05 22:20:10,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:10,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:10,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:10,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143398318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:10,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:10,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:20:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109222487] [2021-06-05 22:20:10,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:10,359 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:10,881 INFO L93 Difference]: Finished difference Result 323 states and 775 transitions. [2021-06-05 22:20:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:20:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:10,882 INFO L225 Difference]: With dead ends: 323 [2021-06-05 22:20:10,882 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:20:10,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:20:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-06-05 22:20:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 22:20:10,886 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 22:20:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:10,886 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 22:20:10,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 22:20:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:10,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:10,887 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:11,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11268 [2021-06-05 22:20:11,093 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash 245316114, now seen corresponding path program 364 times [2021-06-05 22:20:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:11,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775115364] [2021-06-05 22:20:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:11,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:11,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775115364] [2021-06-05 22:20:11,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775115364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:11,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822329122] [2021-06-05 22:20:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:11,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:11,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:11,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822329122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:11,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:11,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:20:11,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911834036] [2021-06-05 22:20:11,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:11,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:11,700 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:12,208 INFO L93 Difference]: Finished difference Result 324 states and 775 transitions. [2021-06-05 22:20:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:20:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:12,209 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:20:12,209 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:20:12,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:20:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-06-05 22:20:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6330645161290325) internal successors, (653), 248 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2021-06-05 22:20:12,212 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 18 [2021-06-05 22:20:12,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:12,212 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2021-06-05 22:20:12,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2021-06-05 22:20:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:12,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:12,213 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:12,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11303 [2021-06-05 22:20:12,414 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash 418563806, now seen corresponding path program 365 times [2021-06-05 22:20:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:12,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055721115] [2021-06-05 22:20:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:12,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:12,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055721115] [2021-06-05 22:20:12,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055721115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:12,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117871514] [2021-06-05 22:20:12,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:12,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:12,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:12,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:13,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117871514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:13,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:13,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:20:13,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355951707] [2021-06-05 22:20:13,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:13,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:13,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:13,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:13,077 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:13,814 INFO L93 Difference]: Finished difference Result 340 states and 797 transitions. [2021-06-05 22:20:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:20:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:13,815 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:20:13,815 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 22:20:13,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 930.0ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:20:13,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 22:20:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 247. [2021-06-05 22:20:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6260162601626016) internal successors, (646), 246 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 646 transitions. [2021-06-05 22:20:13,817 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 646 transitions. Word has length 18 [2021-06-05 22:20:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:13,817 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 646 transitions. [2021-06-05 22:20:13,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 646 transitions. [2021-06-05 22:20:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:13,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:13,818 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:14,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11338,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:14,018 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:14,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1494274962, now seen corresponding path program 366 times [2021-06-05 22:20:14,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:14,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340360582] [2021-06-05 22:20:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:14,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:14,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340360582] [2021-06-05 22:20:14,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340360582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:14,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158248513] [2021-06-05 22:20:14,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:14,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:14,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:14,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:14,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:14,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:14,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:14,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:14,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:14,998 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2021-06-05 22:20:14,998 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 22:20:14,999 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-05 22:20:15,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:15,003 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:15,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:15,046 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:15,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:20:15,050 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:15,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:15,090 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-06-05 22:20:15,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:15,093 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:15,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:15,131 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-06-05 22:20:15,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:15,133 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:20:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:15,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158248513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:15,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:15,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:20:15,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336396754] [2021-06-05 22:20:15,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:15,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:15,241 INFO L87 Difference]: Start difference. First operand 247 states and 646 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:15,774 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 22:20:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:16,132 INFO L93 Difference]: Finished difference Result 332 states and 780 transitions. [2021-06-05 22:20:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:16,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:16,133 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:20:16,133 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:20:16,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1150.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:20:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:20:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2021-06-05 22:20:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2021-06-05 22:20:16,135 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 18 [2021-06-05 22:20:16,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:16,135 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2021-06-05 22:20:16,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2021-06-05 22:20:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:16,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:16,136 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:16,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11375 [2021-06-05 22:20:16,336 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:16,337 INFO L82 PathProgramCache]: Analyzing trace with hash -406032724, now seen corresponding path program 367 times [2021-06-05 22:20:16,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:16,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700900224] [2021-06-05 22:20:16,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:16,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:16,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700900224] [2021-06-05 22:20:16,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700900224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:16,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072636598] [2021-06-05 22:20:16,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:16,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:16,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072636598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:16,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:16,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:20:16,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607210283] [2021-06-05 22:20:16,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:16,886 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:17,431 INFO L93 Difference]: Finished difference Result 371 states and 856 transitions. [2021-06-05 22:20:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:17,433 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:20:17,433 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:20:17,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:20:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:20:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2021-06-05 22:20:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6482213438735176) internal successors, (670), 253 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 670 transitions. [2021-06-05 22:20:17,437 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 670 transitions. Word has length 18 [2021-06-05 22:20:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:17,437 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 670 transitions. [2021-06-05 22:20:17,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 670 transitions. [2021-06-05 22:20:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:17,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:17,438 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:17,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11421 [2021-06-05 22:20:17,659 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1285551912, now seen corresponding path program 368 times [2021-06-05 22:20:17,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:17,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088158007] [2021-06-05 22:20:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:17,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:17,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088158007] [2021-06-05 22:20:17,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088158007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:17,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285782464] [2021-06-05 22:20:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:17,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:18,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285782464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:18,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:18,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:20:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510498081] [2021-06-05 22:20:18,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:18,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:18,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:18,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:18,213 INFO L87 Difference]: Start difference. First operand 254 states and 670 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:18,725 INFO L93 Difference]: Finished difference Result 375 states and 861 transitions. [2021-06-05 22:20:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:18,726 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:20:18,726 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:20:18,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:20:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 22:20:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.642857142857143) internal successors, (666), 252 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 666 transitions. [2021-06-05 22:20:18,728 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 666 transitions. Word has length 18 [2021-06-05 22:20:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:18,729 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 666 transitions. [2021-06-05 22:20:18,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 666 transitions. [2021-06-05 22:20:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:18,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:18,729 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11455 [2021-06-05 22:20:18,930 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1458799604, now seen corresponding path program 369 times [2021-06-05 22:20:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:18,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143215994] [2021-06-05 22:20:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:19,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143215994] [2021-06-05 22:20:19,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143215994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862049333] [2021-06-05 22:20:19,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:19,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862049333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:19,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:19,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:20:19,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938926818] [2021-06-05 22:20:19,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:20:19,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:20:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:19,597 INFO L87 Difference]: Start difference. First operand 253 states and 666 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:20,223 INFO L93 Difference]: Finished difference Result 386 states and 873 transitions. [2021-06-05 22:20:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:20,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:20,224 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:20:20,224 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:20:20,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 834.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:20:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:20:20,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 249. [2021-06-05 22:20:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 22:20:20,227 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 22:20:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:20,227 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 22:20:20,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 22:20:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:20,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:20,228 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:20,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11490 [2021-06-05 22:20:20,428 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:20,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1760456536, now seen corresponding path program 370 times [2021-06-05 22:20:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:20,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130228022] [2021-06-05 22:20:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:20,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130228022] [2021-06-05 22:20:20,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130228022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066132880] [2021-06-05 22:20:20,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:20,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:20,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:20,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:21,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066132880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:21,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:21,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:20:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878853463] [2021-06-05 22:20:21,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:20:21,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:20:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:21,401 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:21,951 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 22:20:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:22,141 INFO L93 Difference]: Finished difference Result 269 states and 682 transitions. [2021-06-05 22:20:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:20:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:22,141 INFO L225 Difference]: With dead ends: 269 [2021-06-05 22:20:22,141 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:20:22,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1195.4ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:20:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:20:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 22:20:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6275303643724697) internal successors, (649), 247 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 649 transitions. [2021-06-05 22:20:22,145 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 649 transitions. Word has length 18 [2021-06-05 22:20:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:22,145 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 649 transitions. [2021-06-05 22:20:22,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 649 transitions. [2021-06-05 22:20:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:22,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:22,146 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:22,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11525 [2021-06-05 22:20:22,360 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1521818228, now seen corresponding path program 371 times [2021-06-05 22:20:22,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:22,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571556701] [2021-06-05 22:20:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:22,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:22,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571556701] [2021-06-05 22:20:22,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571556701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:22,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235981075] [2021-06-05 22:20:22,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:22,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:22,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:23,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235981075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:23,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:23,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:20:23,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177251729] [2021-06-05 22:20:23,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:23,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:23,014 INFO L87 Difference]: Start difference. First operand 248 states and 649 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:23,449 INFO L93 Difference]: Finished difference Result 347 states and 801 transitions. [2021-06-05 22:20:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:23,450 INFO L225 Difference]: With dead ends: 347 [2021-06-05 22:20:23,450 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:20:23,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 638.8ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:20:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:20:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 227. [2021-06-05 22:20:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.601769911504425) internal successors, (588), 226 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 588 transitions. [2021-06-05 22:20:23,453 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 588 transitions. Word has length 18 [2021-06-05 22:20:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:23,453 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 588 transitions. [2021-06-05 22:20:23,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 588 transitions. [2021-06-05 22:20:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:23,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:23,453 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:23,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11573 [2021-06-05 22:20:23,654 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1148383108, now seen corresponding path program 372 times [2021-06-05 22:20:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:23,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908592612] [2021-06-05 22:20:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:23,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908592612] [2021-06-05 22:20:23,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908592612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:23,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337586774] [2021-06-05 22:20:23,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:23,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:20:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:20:23,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:24,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337586774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:24,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:24,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:20:24,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167516377] [2021-06-05 22:20:24,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:24,242 INFO L87 Difference]: Start difference. First operand 227 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:24,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:24,688 INFO L93 Difference]: Finished difference Result 398 states and 930 transitions. [2021-06-05 22:20:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:24,689 INFO L225 Difference]: With dead ends: 398 [2021-06-05 22:20:24,689 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:20:24,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:20:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:20:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 237. [2021-06-05 22:20:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6271186440677967) internal successors, (620), 236 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 620 transitions. [2021-06-05 22:20:24,692 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 620 transitions. Word has length 18 [2021-06-05 22:20:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:24,692 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 620 transitions. [2021-06-05 22:20:24,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 620 transitions. [2021-06-05 22:20:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:24,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:24,692 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:24,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11607,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:24,893 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:24,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:24,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1388829256, now seen corresponding path program 373 times [2021-06-05 22:20:24,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:24,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502831035] [2021-06-05 22:20:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:25,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:25,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502831035] [2021-06-05 22:20:25,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502831035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:25,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806740814] [2021-06-05 22:20:25,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:25,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806740814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:20:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522770809] [2021-06-05 22:20:25,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:25,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:25,700 INFO L87 Difference]: Start difference. First operand 237 states and 620 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:26,405 INFO L93 Difference]: Finished difference Result 426 states and 984 transitions. [2021-06-05 22:20:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:20:26,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:26,406 INFO L225 Difference]: With dead ends: 426 [2021-06-05 22:20:26,406 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 22:20:26,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 917.6ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:20:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 22:20:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 239. [2021-06-05 22:20:26,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2021-06-05 22:20:26,409 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 18 [2021-06-05 22:20:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:26,409 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2021-06-05 22:20:26,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2021-06-05 22:20:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:26,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:26,409 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:26,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11703,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:26,610 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322244, now seen corresponding path program 374 times [2021-06-05 22:20:26,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:26,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940748909] [2021-06-05 22:20:26,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:26,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:26,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940748909] [2021-06-05 22:20:26,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940748909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:26,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986763800] [2021-06-05 22:20:26,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:26,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:26,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:26,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:27,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986763800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:27,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:27,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:20:27,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848653956] [2021-06-05 22:20:27,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:27,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:27,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:27,258 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:27,965 INFO L93 Difference]: Finished difference Result 439 states and 1007 transitions. [2021-06-05 22:20:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:20:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:27,965 INFO L225 Difference]: With dead ends: 439 [2021-06-05 22:20:27,965 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 22:20:27,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:20:27,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 22:20:27,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 241. [2021-06-05 22:20:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2021-06-05 22:20:27,968 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 18 [2021-06-05 22:20:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:27,969 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2021-06-05 22:20:27,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2021-06-05 22:20:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:27,969 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:27,969 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:28,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11793 [2021-06-05 22:20:28,170 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash -397737608, now seen corresponding path program 375 times [2021-06-05 22:20:28,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:28,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513100713] [2021-06-05 22:20:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513100713] [2021-06-05 22:20:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513100713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089207243] [2021-06-05 22:20:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:28,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:20:28,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:28,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:28,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089207243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:28,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:28,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:20:28,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233833236] [2021-06-05 22:20:28,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:28,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:28,854 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:29,524 INFO L93 Difference]: Finished difference Result 409 states and 961 transitions. [2021-06-05 22:20:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:20:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:29,525 INFO L225 Difference]: With dead ends: 409 [2021-06-05 22:20:29,525 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 22:20:29,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:20:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 22:20:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 235. [2021-06-05 22:20:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 22:20:29,528 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 22:20:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:29,528 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 22:20:29,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 22:20:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:29,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:29,528 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:29,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11933,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:29,729 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2036806724, now seen corresponding path program 376 times [2021-06-05 22:20:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:29,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953356285] [2021-06-05 22:20:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:29,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953356285] [2021-06-05 22:20:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953356285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445371924] [2021-06-05 22:20:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:29,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:29,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:29,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445371924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:20:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510987062] [2021-06-05 22:20:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:30,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:30,250 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,852 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 22:20:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:30,869 INFO L93 Difference]: Finished difference Result 341 states and 817 transitions. [2021-06-05 22:20:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:30,869 INFO L225 Difference]: With dead ends: 341 [2021-06-05 22:20:30,870 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:20:30,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:20:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:20:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 235. [2021-06-05 22:20:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 22:20:30,872 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 22:20:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:30,872 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 22:20:30,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 22:20:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:30,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:30,873 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:31,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12086,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:31,073 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash -345222088, now seen corresponding path program 377 times [2021-06-05 22:20:31,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:31,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156808882] [2021-06-05 22:20:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:31,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:31,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156808882] [2021-06-05 22:20:31,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156808882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:31,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671171767] [2021-06-05 22:20:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:31,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:20:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:31,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:31,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671171767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:31,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:31,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:20:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778965057] [2021-06-05 22:20:31,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:31,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:31,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:31,587 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:32,392 INFO L93 Difference]: Finished difference Result 342 states and 817 transitions. [2021-06-05 22:20:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:32,393 INFO L225 Difference]: With dead ends: 342 [2021-06-05 22:20:32,393 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:20:32,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:20:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-06-05 22:20:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 22:20:32,396 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 22:20:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:32,396 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 22:20:32,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 22:20:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:32,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:32,396 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:32,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:32,597 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash -171974396, now seen corresponding path program 378 times [2021-06-05 22:20:32,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:32,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813831672] [2021-06-05 22:20:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:32,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813831672] [2021-06-05 22:20:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813831672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612458980] [2021-06-05 22:20:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:32,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:32,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:33,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:33,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:33,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:33,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:33,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:33,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:33,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,494 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2021-06-05 22:20:33,495 INFO L628 ElimStorePlain]: treesize reduction 919, result has 11.9 percent of original size [2021-06-05 22:20:33,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_328 vanished before elimination [2021-06-05 22:20:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:33,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:20:33,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:33,588 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:33,588 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-05 22:20:33,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:33,592 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:33,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:33,631 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 22:20:33,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:33,633 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:20:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:33,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612458980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:33,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:33,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:20:33,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939046906] [2021-06-05 22:20:33,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:33,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:33,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:33,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:33,746 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:34,182 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 22:20:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:34,498 INFO L93 Difference]: Finished difference Result 335 states and 802 transitions. [2021-06-05 22:20:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:34,498 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:20:34,498 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:20:34,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 930.8ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:20:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:20:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 234. [2021-06-05 22:20:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 22:20:34,502 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 22:20:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:34,503 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 22:20:34,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 22:20:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:34,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:34,503 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:34,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-06-05 22:20:34,727 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash -408825604, now seen corresponding path program 379 times [2021-06-05 22:20:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:34,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173728376] [2021-06-05 22:20:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:35,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:35,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173728376] [2021-06-05 22:20:35,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173728376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:35,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493912768] [2021-06-05 22:20:35,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493912768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:35,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:35,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:20:35,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327714579] [2021-06-05 22:20:35,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:35,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:35,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:35,517 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:36,329 INFO L93 Difference]: Finished difference Result 387 states and 901 transitions. [2021-06-05 22:20:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:20:36,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:36,329 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:20:36,329 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 22:20:36,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1085.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:20:36,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 22:20:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 244. [2021-06-05 22:20:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6502057613168724) internal successors, (644), 243 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 644 transitions. [2021-06-05 22:20:36,332 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 644 transitions. Word has length 18 [2021-06-05 22:20:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:36,332 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 644 transitions. [2021-06-05 22:20:36,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 644 transitions. [2021-06-05 22:20:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:36,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:36,333 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:36,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12203 [2021-06-05 22:20:36,533 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1282759032, now seen corresponding path program 380 times [2021-06-05 22:20:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:36,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468235764] [2021-06-05 22:20:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:36,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:36,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468235764] [2021-06-05 22:20:36,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468235764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:36,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635054028] [2021-06-05 22:20:36,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:36,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:37,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635054028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:37,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:37,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:20:37,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675568458] [2021-06-05 22:20:37,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:20:37,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:20:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:20:37,068 INFO L87 Difference]: Start difference. First operand 244 states and 644 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:37,585 INFO L93 Difference]: Finished difference Result 364 states and 858 transitions. [2021-06-05 22:20:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:20:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:37,585 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:20:37,585 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:20:37,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:20:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:20:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 243. [2021-06-05 22:20:37,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2021-06-05 22:20:37,588 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 18 [2021-06-05 22:20:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:37,588 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2021-06-05 22:20:37,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2021-06-05 22:20:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:37,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:37,589 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:37,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12237 [2021-06-05 22:20:37,789 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1456006724, now seen corresponding path program 381 times [2021-06-05 22:20:37,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:37,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313403702] [2021-06-05 22:20:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:37,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:37,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313403702] [2021-06-05 22:20:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313403702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033949166] [2021-06-05 22:20:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:37,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:20:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:38,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033949166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:38,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:38,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:20:38,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618198454] [2021-06-05 22:20:38,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:38,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:38,344 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:38,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:38,945 INFO L93 Difference]: Finished difference Result 361 states and 849 transitions. [2021-06-05 22:20:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:38,946 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:20:38,946 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:20:38,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:20:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 239. [2021-06-05 22:20:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2021-06-05 22:20:38,950 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 18 [2021-06-05 22:20:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:38,950 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2021-06-05 22:20:38,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2021-06-05 22:20:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:38,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:38,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:39,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12271,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:39,157 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249416, now seen corresponding path program 382 times [2021-06-05 22:20:39,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:39,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671669786] [2021-06-05 22:20:39,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:39,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:39,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671669786] [2021-06-05 22:20:39,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671669786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:39,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654612220] [2021-06-05 22:20:39,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:39,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654612220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:39,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:39,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:20:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231909654] [2021-06-05 22:20:39,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:39,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:39,942 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,254 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 22:20:40,472 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 22:20:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:40,733 INFO L93 Difference]: Finished difference Result 333 states and 794 transitions. [2021-06-05 22:20:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:20:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:40,734 INFO L225 Difference]: With dead ends: 333 [2021-06-05 22:20:40,734 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:20:40,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:20:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-06-05 22:20:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.628691983122363) internal successors, (623), 237 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 623 transitions. [2021-06-05 22:20:40,737 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 623 transitions. Word has length 18 [2021-06-05 22:20:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:40,737 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 623 transitions. [2021-06-05 22:20:40,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 623 transitions. [2021-06-05 22:20:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:40,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:40,738 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:40,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12305 [2021-06-05 22:20:40,938 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1873276766, now seen corresponding path program 383 times [2021-06-05 22:20:40,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:40,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732863592] [2021-06-05 22:20:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:41,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:41,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732863592] [2021-06-05 22:20:41,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732863592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979615091] [2021-06-05 22:20:41,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:41,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:20:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979615091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:41,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:41,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:20:41,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32529233] [2021-06-05 22:20:41,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:41,574 INFO L87 Difference]: Start difference. First operand 238 states and 623 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:42,366 INFO L93 Difference]: Finished difference Result 385 states and 922 transitions. [2021-06-05 22:20:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:42,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:42,367 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:20:42,367 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:20:42,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:20:42,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:20:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 281. [2021-06-05 22:20:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.6714285714285713) internal successors, (748), 280 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 748 transitions. [2021-06-05 22:20:42,370 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 748 transitions. Word has length 18 [2021-06-05 22:20:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:42,370 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 748 transitions. [2021-06-05 22:20:42,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 748 transitions. [2021-06-05 22:20:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:42,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:42,370 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:42,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12339,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:42,571 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1721197542, now seen corresponding path program 384 times [2021-06-05 22:20:42,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:42,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335114337] [2021-06-05 22:20:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:42,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335114337] [2021-06-05 22:20:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335114337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626454467] [2021-06-05 22:20:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:42,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:20:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:42,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:43,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626454467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:43,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:43,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:43,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860951719] [2021-06-05 22:20:43,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:43,182 INFO L87 Difference]: Start difference. First operand 281 states and 748 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:43,587 INFO L93 Difference]: Finished difference Result 395 states and 941 transitions. [2021-06-05 22:20:43,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:43,588 INFO L225 Difference]: With dead ends: 395 [2021-06-05 22:20:43,588 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 22:20:43,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 22:20:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 282. [2021-06-05 22:20:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 22:20:43,591 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 22:20:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 22:20:43,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 22:20:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:43,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:43,591 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:43,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12411 [2021-06-05 22:20:43,792 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:43,792 INFO L82 PathProgramCache]: Analyzing trace with hash -882185118, now seen corresponding path program 385 times [2021-06-05 22:20:43,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:43,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496012813] [2021-06-05 22:20:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:43,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496012813] [2021-06-05 22:20:43,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496012813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:43,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760343881] [2021-06-05 22:20:43,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:44,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760343881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:44,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:44,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425513261] [2021-06-05 22:20:44,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:44,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:44,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:44,470 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:44,898 INFO L93 Difference]: Finished difference Result 383 states and 923 transitions. [2021-06-05 22:20:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:44,899 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:20:44,899 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:20:44,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:20:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 22:20:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 22:20:44,902 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 22:20:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 22:20:44,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 22:20:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:44,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:44,902 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:45,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12537,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:45,103 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1185967740, now seen corresponding path program 386 times [2021-06-05 22:20:45,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:45,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727674847] [2021-06-05 22:20:45,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:45,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:45,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727674847] [2021-06-05 22:20:45,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727674847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:45,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676100532] [2021-06-05 22:20:45,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:45,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:45,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676100532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:45,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:45,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:45,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249859366] [2021-06-05 22:20:45,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:45,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:45,626 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:46,177 INFO L93 Difference]: Finished difference Result 400 states and 952 transitions. [2021-06-05 22:20:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:20:46,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:46,177 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:20:46,177 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:20:46,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:20:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 282. [2021-06-05 22:20:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:46,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 22:20:46,181 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 22:20:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:46,181 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 22:20:46,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 22:20:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:46,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:46,181 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:46,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12708 [2021-06-05 22:20:46,382 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1417414920, now seen corresponding path program 387 times [2021-06-05 22:20:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:46,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747032014] [2021-06-05 22:20:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:46,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:46,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747032014] [2021-06-05 22:20:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747032014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:46,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157772153] [2021-06-05 22:20:46,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:46,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:20:46,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:46,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:46,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157772153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:46,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:46,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861582647] [2021-06-05 22:20:46,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:46,809 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:47,338 INFO L93 Difference]: Finished difference Result 401 states and 952 transitions. [2021-06-05 22:20:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:20:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:47,339 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:20:47,339 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:20:47,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:20:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 281. [2021-06-05 22:20:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.675) internal successors, (749), 280 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 749 transitions. [2021-06-05 22:20:47,343 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 749 transitions. Word has length 18 [2021-06-05 22:20:47,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:47,343 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 749 transitions. [2021-06-05 22:20:47,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 749 transitions. [2021-06-05 22:20:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:47,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:47,344 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:47,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12742 [2021-06-05 22:20:47,544 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1244167228, now seen corresponding path program 388 times [2021-06-05 22:20:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684803206] [2021-06-05 22:20:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:47,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684803206] [2021-06-05 22:20:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684803206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179459031] [2021-06-05 22:20:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:47,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:47,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179459031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:48,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:20:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262690758] [2021-06-05 22:20:48,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:48,057 INFO L87 Difference]: Start difference. First operand 281 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:48,637 INFO L93 Difference]: Finished difference Result 383 states and 921 transitions. [2021-06-05 22:20:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:20:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:48,637 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:20:48,637 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:20:48,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:20:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:20:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 22:20:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 22:20:48,641 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 22:20:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 22:20:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 22:20:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:48,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:48,641 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:48,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12778 [2021-06-05 22:20:48,842 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1773713062, now seen corresponding path program 389 times [2021-06-05 22:20:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:48,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991829444] [2021-06-05 22:20:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991829444] [2021-06-05 22:20:49,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991829444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401325406] [2021-06-05 22:20:49,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:49,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:49,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:49,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 22:20:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:49,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401325406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:49,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:49,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:49,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379645186] [2021-06-05 22:20:49,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:49,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:49,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:49,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:49,410 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:49,877 INFO L93 Difference]: Finished difference Result 344 states and 853 transitions. [2021-06-05 22:20:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:20:49,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:49,878 INFO L225 Difference]: With dead ends: 344 [2021-06-05 22:20:49,878 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:20:49,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:20:49,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:20:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2021-06-05 22:20:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.6843971631205674) internal successors, (757), 282 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 757 transitions. [2021-06-05 22:20:49,881 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 757 transitions. Word has length 18 [2021-06-05 22:20:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:49,881 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 757 transitions. [2021-06-05 22:20:49,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 757 transitions. [2021-06-05 22:20:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:49,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:49,882 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:50,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12815,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:50,082 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:50,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash -829669598, now seen corresponding path program 390 times [2021-06-05 22:20:50,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:50,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338372834] [2021-06-05 22:20:50,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:50,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338372834] [2021-06-05 22:20:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338372834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126147225] [2021-06-05 22:20:50,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:50,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:50,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:50,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:50,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126147225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:50,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:50,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 22:20:50,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440588112] [2021-06-05 22:20:50,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:20:50,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:50,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:20:50,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:20:50,621 INFO L87 Difference]: Start difference. First operand 283 states and 757 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:51,111 INFO L93 Difference]: Finished difference Result 346 states and 855 transitions. [2021-06-05 22:20:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:20:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:51,112 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:20:51,112 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:20:51,112 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 621.3ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:20:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:20:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 282. [2021-06-05 22:20:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 22:20:51,115 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 22:20:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:51,115 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 22:20:51,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 22:20:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:51,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:51,115 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:51,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12851 [2021-06-05 22:20:51,316 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash -656421906, now seen corresponding path program 391 times [2021-06-05 22:20:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:51,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293870894] [2021-06-05 22:20:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:51,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293870894] [2021-06-05 22:20:51,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293870894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:51,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525933719] [2021-06-05 22:20:51,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:51,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:51,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525933719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:51,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:51,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:20:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477265053] [2021-06-05 22:20:51,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:20:51,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:20:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:51,929 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:52,441 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-05 22:20:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:52,518 INFO L93 Difference]: Finished difference Result 303 states and 783 transitions. [2021-06-05 22:20:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:20:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:52,519 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:20:52,519 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:20:52,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 767.0ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:20:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:20:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-06-05 22:20:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 22:20:52,522 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 22:20:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:52,522 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 22:20:52,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 22:20:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:52,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:52,522 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:52,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12888,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:52,723 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash 419289250, now seen corresponding path program 392 times [2021-06-05 22:20:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848135290] [2021-06-05 22:20:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:20:52,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848135290] [2021-06-05 22:20:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848135290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126936343] [2021-06-05 22:20:52,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:52,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:20:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:53,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:53,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:53,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:53,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:53,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:53,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:20:53,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,673 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2021-06-05 22:20:53,673 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 22:20:53,673 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:53,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:53,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:20:53,725 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:53,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-06-05 22:20:53,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:53,770 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:53,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:53,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 22:20:53,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-06-05 22:20:53,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:20:53,810 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:20:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126936343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:53,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:53,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 22:20:53,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322543015] [2021-06-05 22:20:53,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:20:53,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:20:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:20:53,928 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,254 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-06-05 22:20:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:54,593 INFO L93 Difference]: Finished difference Result 351 states and 858 transitions. [2021-06-05 22:20:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:20:54,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:54,594 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:20:54,594 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:20:54,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:20:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:20:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 282. [2021-06-05 22:20:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 22:20:54,597 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 22:20:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:54,597 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 22:20:54,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 22:20:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:54,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:54,598 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:54,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12922 [2021-06-05 22:20:54,798 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:54,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:54,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1481018436, now seen corresponding path program 393 times [2021-06-05 22:20:54,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:54,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221702288] [2021-06-05 22:20:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221702288] [2021-06-05 22:20:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221702288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430329261] [2021-06-05 22:20:55,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:55,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:20:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:20:55,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:55,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:55,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:55,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:20:55,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:20:55,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:20:55,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:20:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:20:55,512 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,664 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 22:20:55,665 INFO L628 ElimStorePlain]: treesize reduction 676, result has 13.0 percent of original size [2021-06-05 22:20:55,665 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:20:55,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:20:55,669 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:55,713 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-05 22:20:55,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:20:55,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:20:55,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:20:55,750 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-06-05 22:20:55,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:20:55,751 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 22:20:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:55,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430329261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:55,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:55,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:20:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672702523] [2021-06-05 22:20:55,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:20:55,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:55,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:20:55,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:20:55,922 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:56,595 INFO L93 Difference]: Finished difference Result 437 states and 1021 transitions. [2021-06-05 22:20:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:20:56,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:56,596 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:20:56,596 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 22:20:56,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:20:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 22:20:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 292. [2021-06-05 22:20:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.7010309278350517) internal successors, (786), 291 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 786 transitions. [2021-06-05 22:20:56,599 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 786 transitions. Word has length 18 [2021-06-05 22:20:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:56,599 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 786 transitions. [2021-06-05 22:20:56,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 786 transitions. [2021-06-05 22:20:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:56,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:56,600 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:56,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12968 [2021-06-05 22:20:56,800 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:56,800 INFO L82 PathProgramCache]: Analyzing trace with hash 210566200, now seen corresponding path program 394 times [2021-06-05 22:20:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:56,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563293311] [2021-06-05 22:20:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:56,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:56,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563293311] [2021-06-05 22:20:56,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563293311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:56,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649988639] [2021-06-05 22:20:56,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:56,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:20:56,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:57,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649988639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:57,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:57,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:20:57,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357470944] [2021-06-05 22:20:57,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:57,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:57,339 INFO L87 Difference]: Start difference. First operand 292 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:57,778 INFO L93 Difference]: Finished difference Result 416 states and 986 transitions. [2021-06-05 22:20:57,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:20:57,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:57,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:57,779 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:20:57,779 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:20:57,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:20:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:20:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 22:20:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.696551724137931) internal successors, (782), 290 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 782 transitions. [2021-06-05 22:20:57,782 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 782 transitions. Word has length 18 [2021-06-05 22:20:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:57,782 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 782 transitions. [2021-06-05 22:20:57,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 782 transitions. [2021-06-05 22:20:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:57,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:57,783 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:57,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13006 [2021-06-05 22:20:57,983 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash 383813892, now seen corresponding path program 395 times [2021-06-05 22:20:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:57,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202866086] [2021-06-05 22:20:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:58,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202866086] [2021-06-05 22:20:58,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202866086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:58,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047706235] [2021-06-05 22:20:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:58,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:20:58,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:20:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:58,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047706235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:58,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:20:58,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:20:58,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992489598] [2021-06-05 22:20:58,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:20:58,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:20:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:20:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:20:58,637 INFO L87 Difference]: Start difference. First operand 291 states and 782 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:20:59,298 INFO L93 Difference]: Finished difference Result 418 states and 980 transitions. [2021-06-05 22:20:59,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:20:59,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:20:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:20:59,298 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:20:59,298 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 22:20:59,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:20:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 22:20:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 287. [2021-06-05 22:20:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6853146853146854) internal successors, (768), 286 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 768 transitions. [2021-06-05 22:20:59,302 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 768 transitions. Word has length 18 [2021-06-05 22:20:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:20:59,302 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 768 transitions. [2021-06-05 22:20:59,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:20:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 768 transitions. [2021-06-05 22:20:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:20:59,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:20:59,302 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:20:59,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13041 [2021-06-05 22:20:59,503 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:20:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:20:59,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1459525048, now seen corresponding path program 396 times [2021-06-05 22:20:59,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:20:59,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844921491] [2021-06-05 22:20:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:20:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:20:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:20:59,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:20:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844921491] [2021-06-05 22:20:59,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844921491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:20:59,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364725404] [2021-06-05 22:20:59,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:20:59,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:20:59,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:20:59,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:20:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:00,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364725404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:00,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:00,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 22:21:00,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906624626] [2021-06-05 22:21:00,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:21:00,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:21:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:21:00,422 INFO L87 Difference]: Start difference. First operand 287 states and 768 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:00,916 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 22:21:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:01,098 INFO L93 Difference]: Finished difference Result 310 states and 803 transitions. [2021-06-05 22:21:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:01,099 INFO L225 Difference]: With dead ends: 310 [2021-06-05 22:21:01,099 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:21:01,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1142.4ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:21:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:21:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 286. [2021-06-05 22:21:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6842105263157894) internal successors, (765), 285 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 765 transitions. [2021-06-05 22:21:01,102 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 765 transitions. Word has length 18 [2021-06-05 22:21:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:01,102 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 765 transitions. [2021-06-05 22:21:01,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 765 transitions. [2021-06-05 22:21:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:01,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:01,102 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:01,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13075,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:01,317 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:01,317 INFO L82 PathProgramCache]: Analyzing trace with hash 446832516, now seen corresponding path program 397 times [2021-06-05 22:21:01,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:01,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729865882] [2021-06-05 22:21:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:01,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:01,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729865882] [2021-06-05 22:21:01,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729865882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:01,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981027708] [2021-06-05 22:21:01,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:01,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981027708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:02,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:02,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 22:21:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506238567] [2021-06-05 22:21:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:21:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:21:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:02,005 INFO L87 Difference]: Start difference. First operand 286 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:02,448 INFO L93 Difference]: Finished difference Result 383 states and 914 transitions. [2021-06-05 22:21:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:02,448 INFO L225 Difference]: With dead ends: 383 [2021-06-05 22:21:02,448 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:21:02,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:21:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 282. [2021-06-05 22:21:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 22:21:02,452 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 22:21:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:02,452 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 22:21:02,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 22:21:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:02,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:02,453 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13110,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:02,673 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 724445586, now seen corresponding path program 398 times [2021-06-05 22:21:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709941925] [2021-06-05 22:21:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:02,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:02,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709941925] [2021-06-05 22:21:02,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709941925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:02,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907037820] [2021-06-05 22:21:02,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:02,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:02,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:03,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907037820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:03,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:03,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:03,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042389881] [2021-06-05 22:21:03,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:03,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:03,268 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:03,729 INFO L93 Difference]: Finished difference Result 391 states and 948 transitions. [2021-06-05 22:21:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:21:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:03,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:03,730 INFO L225 Difference]: With dead ends: 391 [2021-06-05 22:21:03,730 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:21:03,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:21:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:21:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 290. [2021-06-05 22:21:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.698961937716263) internal successors, (780), 289 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 780 transitions. [2021-06-05 22:21:03,733 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 780 transitions. Word has length 18 [2021-06-05 22:21:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:03,733 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 780 transitions. [2021-06-05 22:21:03,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 780 transitions. [2021-06-05 22:21:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:03,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:03,734 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:03,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13144,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:03,934 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:03,934 INFO L82 PathProgramCache]: Analyzing trace with hash 23952598, now seen corresponding path program 399 times [2021-06-05 22:21:03,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:03,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772920659] [2021-06-05 22:21:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:04,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772920659] [2021-06-05 22:21:04,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772920659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:04,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648874452] [2021-06-05 22:21:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:04,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:21:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:04,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648874452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:04,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:04,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:04,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140693871] [2021-06-05 22:21:04,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:04,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:04,480 INFO L87 Difference]: Start difference. First operand 290 states and 780 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:04,946 INFO L93 Difference]: Finished difference Result 416 states and 996 transitions. [2021-06-05 22:21:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:21:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:04,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:04,947 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:21:04,947 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:21:04,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:21:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:21:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 22:21:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 22:21:04,950 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 22:21:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:04,951 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 22:21:04,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 22:21:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:04,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:04,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:05,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13216,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:05,152 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1715537234, now seen corresponding path program 400 times [2021-06-05 22:21:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:05,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690648958] [2021-06-05 22:21:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:05,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690648958] [2021-06-05 22:21:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690648958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183034533] [2021-06-05 22:21:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:05,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:05,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:05,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:05,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183034533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:05,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:05,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669595503] [2021-06-05 22:21:05,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:05,718 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:06,168 INFO L93 Difference]: Finished difference Result 401 states and 973 transitions. [2021-06-05 22:21:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:21:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:06,169 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:21:06,169 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:21:06,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:21:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:21:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2021-06-05 22:21:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6933797909407664) internal successors, (773), 287 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 773 transitions. [2021-06-05 22:21:06,172 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 773 transitions. Word has length 18 [2021-06-05 22:21:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:06,172 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 773 transitions. [2021-06-05 22:21:06,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 773 transitions. [2021-06-05 22:21:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:06,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:06,172 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:06,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13338 [2021-06-05 22:21:06,373 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -511277204, now seen corresponding path program 401 times [2021-06-05 22:21:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:06,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758274231] [2021-06-05 22:21:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:06,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758274231] [2021-06-05 22:21:06,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758274231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754101998] [2021-06-05 22:21:06,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:06,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:21:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:06,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754101998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:06,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:06,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088461434] [2021-06-05 22:21:06,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:06,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:06,787 INFO L87 Difference]: Start difference. First operand 288 states and 773 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:07,357 INFO L93 Difference]: Finished difference Result 415 states and 999 transitions. [2021-06-05 22:21:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:21:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:07,358 INFO L225 Difference]: With dead ends: 415 [2021-06-05 22:21:07,358 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 22:21:07,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:21:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 22:21:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 291. [2021-06-05 22:21:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 22:21:07,363 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 22:21:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:07,363 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 22:21:07,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 22:21:07,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:07,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:07,363 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:07,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13465 [2021-06-05 22:21:07,585 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1180307432, now seen corresponding path program 402 times [2021-06-05 22:21:07,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:07,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805910645] [2021-06-05 22:21:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:07,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805910645] [2021-06-05 22:21:07,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805910645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:07,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862667552] [2021-06-05 22:21:07,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:07,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:21:07,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:08,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862667552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:08,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:08,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:21:08,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79863423] [2021-06-05 22:21:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:08,055 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:08,739 INFO L93 Difference]: Finished difference Result 416 states and 999 transitions. [2021-06-05 22:21:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:21:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:08,740 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:21:08,740 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:21:08,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 706.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:21:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:21:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 22:21:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 22:21:08,743 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 22:21:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:08,743 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 22:21:08,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 22:21:08,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:08,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:08,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:08,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13499 [2021-06-05 22:21:08,944 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1353555124, now seen corresponding path program 403 times [2021-06-05 22:21:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:08,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306636377] [2021-06-05 22:21:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:09,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306636377] [2021-06-05 22:21:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306636377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001911968] [2021-06-05 22:21:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:09,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:09,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001911968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:09,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:09,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:21:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344205620] [2021-06-05 22:21:09,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:09,406 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:09,978 INFO L93 Difference]: Finished difference Result 398 states and 968 transitions. [2021-06-05 22:21:09,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:21:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:09,978 INFO L225 Difference]: With dead ends: 398 [2021-06-05 22:21:09,978 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:21:09,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:21:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:21:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 291. [2021-06-05 22:21:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 22:21:09,982 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 22:21:09,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:09,982 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 22:21:09,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 22:21:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:09,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:09,982 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:10,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13538 [2021-06-05 22:21:10,183 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash 76468118, now seen corresponding path program 404 times [2021-06-05 22:21:10,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:10,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909703781] [2021-06-05 22:21:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:10,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:10,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909703781] [2021-06-05 22:21:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909703781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:10,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592841389] [2021-06-05 22:21:10,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:10,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:10,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:10,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:10,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592841389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:10,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:10,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:10,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694605739] [2021-06-05 22:21:10,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:10,704 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:11,257 INFO L93 Difference]: Finished difference Result 375 states and 931 transitions. [2021-06-05 22:21:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:11,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:11,257 INFO L225 Difference]: With dead ends: 375 [2021-06-05 22:21:11,257 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:21:11,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 627.9ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:21:11,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:21:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 295. [2021-06-05 22:21:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 22:21:11,260 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 18 [2021-06-05 22:21:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:11,261 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 22:21:11,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 22:21:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:11,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:11,261 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:11,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13573,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:11,461 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1768052754, now seen corresponding path program 405 times [2021-06-05 22:21:11,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:11,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294869648] [2021-06-05 22:21:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:11,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:11,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294869648] [2021-06-05 22:21:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294869648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:11,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199274727] [2021-06-05 22:21:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:11,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:11,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:12,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199274727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:12,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:12,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:21:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069101321] [2021-06-05 22:21:12,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:12,014 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:12,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:12,733 INFO L93 Difference]: Finished difference Result 405 states and 978 transitions. [2021-06-05 22:21:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:21:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:12,734 INFO L225 Difference]: With dead ends: 405 [2021-06-05 22:21:12,734 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 22:21:12,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:21:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 22:21:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 294. [2021-06-05 22:21:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 22:21:12,737 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 22:21:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 22:21:12,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 22:21:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:12,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:12,738 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:12,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13607,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:12,938 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1941300446, now seen corresponding path program 406 times [2021-06-05 22:21:12,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:12,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328137572] [2021-06-05 22:21:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:13,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:13,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328137572] [2021-06-05 22:21:13,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328137572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:13,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087340795] [2021-06-05 22:21:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:13,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:13,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087340795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:13,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:13,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:21:13,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801963376] [2021-06-05 22:21:13,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:13,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:13,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:13,440 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:13,889 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 22:21:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:14,086 INFO L93 Difference]: Finished difference Result 373 states and 923 transitions. [2021-06-05 22:21:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:14,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:14,087 INFO L225 Difference]: With dead ends: 373 [2021-06-05 22:21:14,087 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:21:14,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:14,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:21:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-06-05 22:21:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 22:21:14,090 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 22:21:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:14,090 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 22:21:14,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 22:21:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:14,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:14,091 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:14,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13641 [2021-06-05 22:21:14,291 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1277955694, now seen corresponding path program 407 times [2021-06-05 22:21:14,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:14,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315092070] [2021-06-05 22:21:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:14,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:14,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315092070] [2021-06-05 22:21:14,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315092070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:14,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953099617] [2021-06-05 22:21:14,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:14,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953099617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:14,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:14,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:14,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230747471] [2021-06-05 22:21:14,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:14,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:14,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:14,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:14,867 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:15,484 INFO L93 Difference]: Finished difference Result 371 states and 918 transitions. [2021-06-05 22:21:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:15,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:15,485 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:21:15,485 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:21:15,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:21:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-06-05 22:21:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 22:21:15,488 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 22:21:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:15,488 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 22:21:15,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 22:21:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:15,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:15,489 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:15,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13676 [2021-06-05 22:21:15,689 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1116703916, now seen corresponding path program 408 times [2021-06-05 22:21:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:15,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050087929] [2021-06-05 22:21:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:15,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:15,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:15,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050087929] [2021-06-05 22:21:15,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050087929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:15,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119273266] [2021-06-05 22:21:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:15,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:21:15,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:15,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119273266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:16,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:16,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229579642] [2021-06-05 22:21:16,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:16,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:16,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:16,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:16,189 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:16,479 INFO L93 Difference]: Finished difference Result 334 states and 863 transitions. [2021-06-05 22:21:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:16,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:16,480 INFO L225 Difference]: With dead ends: 334 [2021-06-05 22:21:16,480 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:21:16,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:21:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 298. [2021-06-05 22:21:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7205387205387206) internal successors, (808), 297 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 808 transitions. [2021-06-05 22:21:16,483 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 808 transitions. Word has length 18 [2021-06-05 22:21:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:16,483 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 808 transitions. [2021-06-05 22:21:16,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 808 transitions. [2021-06-05 22:21:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:16,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:16,484 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:16,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13710 [2021-06-05 22:21:16,684 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1486678744, now seen corresponding path program 409 times [2021-06-05 22:21:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567565046] [2021-06-05 22:21:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:17,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:17,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567565046] [2021-06-05 22:21:17,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567565046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:17,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288148887] [2021-06-05 22:21:17,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:17,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288148887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:17,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:17,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:17,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148141947] [2021-06-05 22:21:17,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:17,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:17,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:17,399 INFO L87 Difference]: Start difference. First operand 298 states and 808 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:18,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:18,013 INFO L93 Difference]: Finished difference Result 336 states and 865 transitions. [2021-06-05 22:21:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:18,014 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:21:18,014 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:21:18,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:18,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:21:18,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2021-06-05 22:21:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 22:21:18,017 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 18 [2021-06-05 22:21:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:18,017 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 22:21:18,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 22:21:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:18,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:18,018 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:18,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:18,220 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1313431052, now seen corresponding path program 410 times [2021-06-05 22:21:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:18,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178878816] [2021-06-05 22:21:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:18,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:18,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178878816] [2021-06-05 22:21:18,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178878816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:18,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31441841] [2021-06-05 22:21:18,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:18,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:18,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31441841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:18,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:18,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:18,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304529856] [2021-06-05 22:21:18,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:18,835 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:19,409 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 22:21:19,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:19,484 INFO L93 Difference]: Finished difference Result 323 states and 842 transitions. [2021-06-05 22:21:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:19,485 INFO L225 Difference]: With dead ends: 323 [2021-06-05 22:21:19,485 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 22:21:19,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 22:21:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 297. [2021-06-05 22:21:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 22:21:19,488 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 22:21:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 22:21:19,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 22:21:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:19,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:19,488 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:19,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13778 [2021-06-05 22:21:19,698 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:19,698 INFO L82 PathProgramCache]: Analyzing trace with hash -237719896, now seen corresponding path program 411 times [2021-06-05 22:21:19,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:19,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502235079] [2021-06-05 22:21:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:19,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502235079] [2021-06-05 22:21:19,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502235079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:19,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723376122] [2021-06-05 22:21:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:19,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723376122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 22:21:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602148233] [2021-06-05 22:21:20,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:20,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:20,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:20,254 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:20,540 INFO L93 Difference]: Finished difference Result 323 states and 843 transitions. [2021-06-05 22:21:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:20,541 INFO L225 Difference]: With dead ends: 323 [2021-06-05 22:21:20,541 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:21:20,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:21:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 297. [2021-06-05 22:21:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 22:21:20,544 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 22:21:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:20,544 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 22:21:20,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 22:21:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:20,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:20,544 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:20,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13813 [2021-06-05 22:21:20,745 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1250412428, now seen corresponding path program 412 times [2021-06-05 22:21:20,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:20,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800438901] [2021-06-05 22:21:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800438901] [2021-06-05 22:21:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800438901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616262166] [2021-06-05 22:21:20,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:20,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:20,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:20,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:20,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:21,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616262166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:21,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:21,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:21,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406330950] [2021-06-05 22:21:21,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:21,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:21,355 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:21,640 INFO L93 Difference]: Finished difference Result 321 states and 840 transitions. [2021-06-05 22:21:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:21,641 INFO L225 Difference]: With dead ends: 321 [2021-06-05 22:21:21,641 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 22:21:21,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:21:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 22:21:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 297. [2021-06-05 22:21:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 22:21:21,644 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 22:21:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:21,644 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 22:21:21,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 22:21:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:21,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:21,644 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:21,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13847,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:21,845 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2031785404, now seen corresponding path program 413 times [2021-06-05 22:21:21,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:21,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538850580] [2021-06-05 22:21:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:22,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538850580] [2021-06-05 22:21:22,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538850580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405197053] [2021-06-05 22:21:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:22,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:21:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:22,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405197053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:22,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:22,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 22:21:22,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840078769] [2021-06-05 22:21:22,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:21:22,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:22,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:21:22,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:22,260 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:22,663 INFO L93 Difference]: Finished difference Result 419 states and 1119 transitions. [2021-06-05 22:21:22,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:22,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:22,664 INFO L225 Difference]: With dead ends: 419 [2021-06-05 22:21:22,664 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 22:21:22,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 22:21:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 302. [2021-06-05 22:21:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.7209302325581395) internal successors, (819), 301 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 819 transitions. [2021-06-05 22:21:22,668 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 819 transitions. Word has length 18 [2021-06-05 22:21:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:22,668 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 819 transitions. [2021-06-05 22:21:22,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 819 transitions. [2021-06-05 22:21:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:22,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:22,668 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:22,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13882,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:22,869 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash -571597256, now seen corresponding path program 414 times [2021-06-05 22:21:22,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:22,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130529903] [2021-06-05 22:21:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:23,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:23,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130529903] [2021-06-05 22:21:23,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130529903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:23,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238053039] [2021-06-05 22:21:23,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:23,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:23,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:23,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238053039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:23,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:23,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 22:21:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250111301] [2021-06-05 22:21:23,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:21:23,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:21:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:23,263 INFO L87 Difference]: Start difference. First operand 302 states and 819 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:23,645 INFO L93 Difference]: Finished difference Result 421 states and 1121 transitions. [2021-06-05 22:21:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:23,645 INFO L225 Difference]: With dead ends: 421 [2021-06-05 22:21:23,645 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:21:23,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:21:23,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 301. [2021-06-05 22:21:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 22:21:23,649 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 18 [2021-06-05 22:21:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:23,649 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 22:21:23,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 22:21:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:23,649 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:23,650 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:23,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13892,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:23,850 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash -398349564, now seen corresponding path program 415 times [2021-06-05 22:21:23,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:23,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558431777] [2021-06-05 22:21:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:24,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558431777] [2021-06-05 22:21:24,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558431777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808696692] [2021-06-05 22:21:24,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:24,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808696692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:24,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:24,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:24,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243832262] [2021-06-05 22:21:24,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:24,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:24,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:24,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:24,302 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:24,655 INFO L93 Difference]: Finished difference Result 408 states and 1100 transitions. [2021-06-05 22:21:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:24,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:24,656 INFO L225 Difference]: With dead ends: 408 [2021-06-05 22:21:24,656 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:21:24,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:21:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 300. [2021-06-05 22:21:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7157190635451505) internal successors, (812), 299 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 812 transitions. [2021-06-05 22:21:24,660 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 812 transitions. Word has length 18 [2021-06-05 22:21:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:24,660 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 812 transitions. [2021-06-05 22:21:24,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 812 transitions. [2021-06-05 22:21:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:24,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:24,660 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:24,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13904 [2021-06-05 22:21:24,861 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash 677361592, now seen corresponding path program 416 times [2021-06-05 22:21:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163699661] [2021-06-05 22:21:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:25,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163699661] [2021-06-05 22:21:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163699661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338690518] [2021-06-05 22:21:25,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:25,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:25,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:25,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:21:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:25,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:21:25,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:21:25,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:21:25,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:21:25,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:21:25,635 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:25,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:21:25,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,836 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2021-06-05 22:21:25,837 INFO L628 ElimStorePlain]: treesize reduction 908, result has 12.6 percent of original size [2021-06-05 22:21:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:25,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:25,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:25,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:25,889 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:25,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-05 22:21:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:25,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:25,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:25,975 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-05 22:21:25,976 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 22:21:25,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:21:25,977 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:21:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:26,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338690518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:26,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:26,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:21:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188561632] [2021-06-05 22:21:26,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:21:26,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:21:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:26,098 INFO L87 Difference]: Start difference. First operand 300 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,363 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 22:21:26,508 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 22:21:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:26,747 INFO L93 Difference]: Finished difference Result 407 states and 1097 transitions. [2021-06-05 22:21:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:26,748 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:21:26,748 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:21:26,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:21:26,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:21:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 299. [2021-06-05 22:21:26,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.714765100671141) internal successors, (809), 298 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 809 transitions. [2021-06-05 22:21:26,751 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 809 transitions. Word has length 18 [2021-06-05 22:21:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:26,751 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 809 transitions. [2021-06-05 22:21:26,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 809 transitions. [2021-06-05 22:21:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:26,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:26,752 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:26,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:26,952 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash -335330940, now seen corresponding path program 417 times [2021-06-05 22:21:26,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:26,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240473376] [2021-06-05 22:21:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:27,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240473376] [2021-06-05 22:21:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240473376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:27,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280187648] [2021-06-05 22:21:27,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:27,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280187648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:27,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:27,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 22:21:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884191777] [2021-06-05 22:21:27,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:27,371 INFO L87 Difference]: Start difference. First operand 299 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:27,823 INFO L93 Difference]: Finished difference Result 406 states and 1094 transitions. [2021-06-05 22:21:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:27,824 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:21:27,824 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 22:21:27,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 22:21:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2021-06-05 22:21:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 22:21:27,827 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 18 [2021-06-05 22:21:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:27,827 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 22:21:27,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 22:21:27,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:21:27,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:27,828 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:28,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13966 [2021-06-05 22:21:28,037 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash -180893422, now seen corresponding path program 418 times [2021-06-05 22:21:28,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:28,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371205550] [2021-06-05 22:21:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:28,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:28,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371205550] [2021-06-05 22:21:28,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371205550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:28,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753633815] [2021-06-05 22:21:28,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:28,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 22:21:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:28,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753633815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:28,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:28,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 22:21:28,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930527689] [2021-06-05 22:21:28,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:21:28,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:21:28,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:21:28,415 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:28,934 INFO L93 Difference]: Finished difference Result 403 states and 1088 transitions. [2021-06-05 22:21:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:21:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:21:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:28,935 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:21:28,935 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:21:28,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:28,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:21:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 300. [2021-06-05 22:21:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 22:21:28,938 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 18 [2021-06-05 22:21:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:28,938 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 22:21:28,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 22:21:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:28,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:28,939 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:29,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13978,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:29,139 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1160331542, now seen corresponding path program 419 times [2021-06-05 22:21:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:29,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043169392] [2021-06-05 22:21:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:29,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043169392] [2021-06-05 22:21:29,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043169392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809043585] [2021-06-05 22:21:29,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:29,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:29,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809043585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:29,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 22:21:29,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759121613] [2021-06-05 22:21:29,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:29,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:29,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:29,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:29,427 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:29,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:29,805 INFO L93 Difference]: Finished difference Result 390 states and 1055 transitions. [2021-06-05 22:21:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:21:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:29,806 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:21:29,806 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 22:21:29,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 441.9ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 22:21:29,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 295. [2021-06-05 22:21:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 22:21:29,809 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 19 [2021-06-05 22:21:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:29,809 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 22:21:29,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 22:21:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:29,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:29,810 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:30,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13995 [2021-06-05 22:21:30,010 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1541559239, now seen corresponding path program 420 times [2021-06-05 22:21:30,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:30,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181400989] [2021-06-05 22:21:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181400989] [2021-06-05 22:21:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181400989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635230096] [2021-06-05 22:21:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:30,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:30,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635230096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:30,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:30,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 22:21:30,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310423383] [2021-06-05 22:21:30,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:21:30,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:30,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:21:30,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:21:30,277 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:30,539 INFO L93 Difference]: Finished difference Result 389 states and 1060 transitions. [2021-06-05 22:21:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:30,540 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:21:30,540 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:21:30,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:21:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 296. [2021-06-05 22:21:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.7186440677966104) internal successors, (802), 295 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 802 transitions. [2021-06-05 22:21:30,543 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 802 transitions. Word has length 19 [2021-06-05 22:21:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:30,543 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 802 transitions. [2021-06-05 22:21:30,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 802 transitions. [2021-06-05 22:21:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:30,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:30,544 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:30,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14001,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:30,744 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:30,744 INFO L82 PathProgramCache]: Analyzing trace with hash -839322326, now seen corresponding path program 421 times [2021-06-05 22:21:30,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:30,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297368689] [2021-06-05 22:21:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:30,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:30,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297368689] [2021-06-05 22:21:30,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297368689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:30,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040990494] [2021-06-05 22:21:30,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:30,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:31,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:31,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:31,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:31,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:31,242 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:31,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:31,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:31,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:31,259 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:31,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_414 vanished before elimination [2021-06-05 22:21:31,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:31,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040990494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:31,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:31,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107226701] [2021-06-05 22:21:31,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:31,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:31,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:31,290 INFO L87 Difference]: Start difference. First operand 296 states and 802 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:31,747 INFO L93 Difference]: Finished difference Result 390 states and 1056 transitions. [2021-06-05 22:21:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:21:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:31,748 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:21:31,748 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:21:31,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:21:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 297. [2021-06-05 22:21:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 22:21:31,751 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 22:21:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:31,751 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 22:21:31,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:31,751 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 22:21:31,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:31,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:31,751 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14004 [2021-06-05 22:21:31,952 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash -625250165, now seen corresponding path program 422 times [2021-06-05 22:21:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:31,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181037582] [2021-06-05 22:21:31,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:32,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181037582] [2021-06-05 22:21:32,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181037582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554968289] [2021-06-05 22:21:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:32,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:32,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:32,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:32,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:32,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:32,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:32,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,340 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:32,340 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:32,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:32,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554968289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:32,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:32,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237392383] [2021-06-05 22:21:32,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:32,365 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:32,595 INFO L93 Difference]: Finished difference Result 338 states and 882 transitions. [2021-06-05 22:21:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:32,596 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:21:32,596 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:21:32,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:21:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2021-06-05 22:21:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 22:21:32,599 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 22:21:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:32,599 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 22:21:32,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 22:21:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:32,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:32,600 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:32,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14021,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:32,800 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 20163430, now seen corresponding path program 423 times [2021-06-05 22:21:32,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:32,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785626741] [2021-06-05 22:21:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:32,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:32,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785626741] [2021-06-05 22:21:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785626741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229753214] [2021-06-05 22:21:32,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:32,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:32,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:32,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:33,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:33,288 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:33,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:33,326 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:33,326 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:33,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:33,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:33,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:33,343 INFO L518 ElimStorePlain]: Eliminatee v_prenex_422 vanished before elimination [2021-06-05 22:21:33,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:33,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:33,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229753214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:33,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:33,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:33,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259255101] [2021-06-05 22:21:33,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:33,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:33,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:33,375 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:33,848 INFO L93 Difference]: Finished difference Result 388 states and 1053 transitions. [2021-06-05 22:21:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:33,848 INFO L225 Difference]: With dead ends: 388 [2021-06-05 22:21:33,848 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:21:33,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:21:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2021-06-05 22:21:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 22:21:33,852 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 22:21:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:33,852 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 22:21:33,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 22:21:33,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:33,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:33,852 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:34,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14025,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:34,073 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:34,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1551089637, now seen corresponding path program 424 times [2021-06-05 22:21:34,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:34,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374653231] [2021-06-05 22:21:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:34,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374653231] [2021-06-05 22:21:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374653231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543016608] [2021-06-05 22:21:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:34,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:34,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:34,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:34,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:34,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,394 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:34,394 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:34,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:34,395 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:34,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543016608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:34,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:34,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:34,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503830702] [2021-06-05 22:21:34,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:34,418 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:34,671 INFO L93 Difference]: Finished difference Result 335 states and 876 transitions. [2021-06-05 22:21:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:34,671 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:21:34,671 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:21:34,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:21:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:21:34,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 298. [2021-06-05 22:21:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 22:21:34,674 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 22:21:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 22:21:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 22:21:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:34,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:34,675 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:34,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14051,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:34,876 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1156267434, now seen corresponding path program 425 times [2021-06-05 22:21:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:34,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769014815] [2021-06-05 22:21:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769014815] [2021-06-05 22:21:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769014815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443561589] [2021-06-05 22:21:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:34,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:34,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:35,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:35,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:35,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:35,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:35,371 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:35,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-06-05 22:21:35,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:35,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:35,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:35,389 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:35,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:35,390 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443561589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:35,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510431564] [2021-06-05 22:21:35,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:35,426 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:35,933 INFO L93 Difference]: Finished difference Result 386 states and 1050 transitions. [2021-06-05 22:21:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:21:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:35,934 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:21:35,934 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 22:21:35,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 22:21:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 298. [2021-06-05 22:21:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 22:21:35,938 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 22:21:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:35,939 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 22:21:35,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 22:21:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:35,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:35,939 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:36,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14055,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:36,158 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1898388811, now seen corresponding path program 426 times [2021-06-05 22:21:36,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:36,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038364971] [2021-06-05 22:21:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:36,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:36,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038364971] [2021-06-05 22:21:36,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038364971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:36,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106575122] [2021-06-05 22:21:36,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:36,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:21:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:36,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:36,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:36,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:36,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:36,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:36,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:36,508 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:36,508 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:36,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:36,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:36,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106575122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:36,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:36,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888499856] [2021-06-05 22:21:36,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:36,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:36,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:36,532 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:36,742 INFO L93 Difference]: Finished difference Result 332 states and 870 transitions. [2021-06-05 22:21:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:36,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:36,743 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:21:36,743 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:21:36,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:21:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:21:36,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 299. [2021-06-05 22:21:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7114093959731544) internal successors, (808), 298 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 808 transitions. [2021-06-05 22:21:36,746 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 808 transitions. Word has length 19 [2021-06-05 22:21:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:36,746 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 808 transitions. [2021-06-05 22:21:36,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 808 transitions. [2021-06-05 22:21:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:36,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:36,747 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:36,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14082,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:36,947 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash 915821286, now seen corresponding path program 427 times [2021-06-05 22:21:36,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:36,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813161836] [2021-06-05 22:21:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:37,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:37,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813161836] [2021-06-05 22:21:37,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813161836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:37,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102113308] [2021-06-05 22:21:37,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:37,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:21:37,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:37,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:37,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,349 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:21:37,349 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:37,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:37,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:37,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:37,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-05 22:21:37,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:37,368 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:21:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:37,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102113308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:37,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:37,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:37,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637489088] [2021-06-05 22:21:37,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:37,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:37,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:37,435 INFO L87 Difference]: Start difference. First operand 299 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:38,607 INFO L93 Difference]: Finished difference Result 407 states and 1087 transitions. [2021-06-05 22:21:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:21:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:38,608 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:21:38,608 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 22:21:38,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1142.7ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:21:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 22:21:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 301. [2021-06-05 22:21:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 22:21:38,612 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 22:21:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:38,612 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 22:21:38,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 22:21:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:38,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:38,613 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:38,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14086 [2021-06-05 22:21:38,829 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash 662666021, now seen corresponding path program 428 times [2021-06-05 22:21:38,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807879682] [2021-06-05 22:21:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:38,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807879682] [2021-06-05 22:21:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807879682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544723559] [2021-06-05 22:21:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:38,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:38,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:38,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:39,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:39,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:39,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:39,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:39,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:39,132 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:21:39,132 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:39,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:39,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:21:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544723559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:39,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:39,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:39,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105298999] [2021-06-05 22:21:39,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:39,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:39,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:39,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:39,182 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:39,638 INFO L93 Difference]: Finished difference Result 357 states and 915 transitions. [2021-06-05 22:21:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:39,638 INFO L225 Difference]: With dead ends: 357 [2021-06-05 22:21:39,638 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:21:39,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:39,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:21:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 301. [2021-06-05 22:21:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 22:21:39,641 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 22:21:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:39,641 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 22:21:39,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 22:21:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:39,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:39,642 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:39,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14099,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:39,842 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash 215328298, now seen corresponding path program 429 times [2021-06-05 22:21:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:39,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986023959] [2021-06-05 22:21:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:39,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986023959] [2021-06-05 22:21:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986023959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135410725] [2021-06-05 22:21:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:39,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:21:39,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:39,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:40,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:40,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:40,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:40,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:40,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:40,237 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:21:40,237 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:21:40,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:40,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:40,255 INFO L518 ElimStorePlain]: Eliminatee v_prenex_436 vanished before elimination [2021-06-05 22:21:40,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:40,256 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:21:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:40,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135410725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:40,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:40,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:40,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39285766] [2021-06-05 22:21:40,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:40,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:40,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:40,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:40,315 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:40,837 INFO L93 Difference]: Finished difference Result 392 states and 1066 transitions. [2021-06-05 22:21:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:21:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:40,838 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:21:40,838 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 22:21:40,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:21:40,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 22:21:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 300. [2021-06-05 22:21:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 299 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 811 transitions. [2021-06-05 22:21:40,841 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 811 transitions. Word has length 19 [2021-06-05 22:21:40,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:40,842 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 811 transitions. [2021-06-05 22:21:40,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 811 transitions. [2021-06-05 22:21:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:40,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:40,842 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:41,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14107 [2021-06-05 22:21:41,043 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:41,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1767468947, now seen corresponding path program 430 times [2021-06-05 22:21:41,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:41,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079779343] [2021-06-05 22:21:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:41,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:41,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079779343] [2021-06-05 22:21:41,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079779343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:41,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379124183] [2021-06-05 22:21:41,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:41,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:41,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:41,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:41,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:41,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:41,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:41,348 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:21:41,348 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:41,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:41,349 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:21:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:41,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379124183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:41,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:41,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50317599] [2021-06-05 22:21:41,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:41,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:41,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:41,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:41,420 INFO L87 Difference]: Start difference. First operand 300 states and 811 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:41,925 INFO L93 Difference]: Finished difference Result 334 states and 873 transitions. [2021-06-05 22:21:41,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:21:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:41,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:41,926 INFO L225 Difference]: With dead ends: 334 [2021-06-05 22:21:41,926 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:21:41,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:21:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:21:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-06-05 22:21:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.709030100334448) internal successors, (810), 299 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 810 transitions. [2021-06-05 22:21:41,929 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 810 transitions. Word has length 19 [2021-06-05 22:21:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:41,929 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 810 transitions. [2021-06-05 22:21:41,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 810 transitions. [2021-06-05 22:21:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:41,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:41,929 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:42,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14124,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:42,130 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1475445976, now seen corresponding path program 431 times [2021-06-05 22:21:42,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:42,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118170726] [2021-06-05 22:21:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:42,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118170726] [2021-06-05 22:21:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118170726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783604973] [2021-06-05 22:21:42,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:42,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:21:42,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:42,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:42,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:42,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:42,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:42,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:42,589 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:42,589 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:42,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:42,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:42,606 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-05 22:21:42,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:42,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:42,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783604973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:42,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:42,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:42,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63816102] [2021-06-05 22:21:42,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:42,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:42,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:42,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:42,641 INFO L87 Difference]: Start difference. First operand 300 states and 810 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:42,928 INFO L93 Difference]: Finished difference Result 319 states and 839 transitions. [2021-06-05 22:21:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:21:42,928 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:42,929 INFO L225 Difference]: With dead ends: 319 [2021-06-05 22:21:42,929 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:21:42,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:21:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 22:21:42,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 22:21:42,932 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 22:21:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:42,932 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 22:21:42,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 22:21:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:42,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:42,932 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:43,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14135,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,133 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:43,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1689518137, now seen corresponding path program 432 times [2021-06-05 22:21:43,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:43,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425700151] [2021-06-05 22:21:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:43,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:43,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425700151] [2021-06-05 22:21:43,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425700151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:43,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2590076] [2021-06-05 22:21:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:43,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:43,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:43,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:43,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:43,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:43,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,422 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:43,422 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:43,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:43,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:43,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2590076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:43,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:43,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:43,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092725274] [2021-06-05 22:21:43,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:43,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:43,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:43,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:43,446 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:43,660 INFO L93 Difference]: Finished difference Result 323 states and 853 transitions. [2021-06-05 22:21:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:43,660 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:43,665 INFO L225 Difference]: With dead ends: 323 [2021-06-05 22:21:43,665 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:21:43,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:21:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 300. [2021-06-05 22:21:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 22:21:43,668 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 22:21:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:43,668 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 22:21:43,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 22:21:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:43,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:43,669 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:43,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14152,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,869 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1960035564, now seen corresponding path program 433 times [2021-06-05 22:21:43,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:43,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122729528] [2021-06-05 22:21:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:43,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122729528] [2021-06-05 22:21:43,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122729528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:43,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070916832] [2021-06-05 22:21:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:44,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:44,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:44,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:44,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:44,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:44,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:44,340 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:44,340 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:44,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:44,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:44,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:44,357 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-06-05 22:21:44,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:44,358 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:44,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070916832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:44,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:44,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:44,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370250383] [2021-06-05 22:21:44,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:44,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:44,388 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:44,641 INFO L93 Difference]: Finished difference Result 316 states and 833 transitions. [2021-06-05 22:21:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:21:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:44,642 INFO L225 Difference]: With dead ends: 316 [2021-06-05 22:21:44,642 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:21:44,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:21:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 22:21:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 22:21:44,645 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 22:21:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:44,645 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 22:21:44,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 22:21:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:44,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:44,645 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:44,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14156,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:44,846 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash -429109357, now seen corresponding path program 434 times [2021-06-05 22:21:44,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:44,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477422385] [2021-06-05 22:21:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:44,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:44,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477422385] [2021-06-05 22:21:44,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477422385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:44,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49132548] [2021-06-05 22:21:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:44,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:45,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:45,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:45,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:45,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:45,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:45,146 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:45,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:45,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:45,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:45,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49132548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:45,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:45,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:45,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114206268] [2021-06-05 22:21:45,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:45,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:45,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:45,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:45,170 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:45,348 INFO L93 Difference]: Finished difference Result 339 states and 884 transitions. [2021-06-05 22:21:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:45,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:45,349 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:21:45,349 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:21:45,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:21:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2021-06-05 22:21:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 22:21:45,352 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 22:21:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:45,352 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 22:21:45,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 22:21:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:45,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:45,353 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:45,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14182 [2021-06-05 22:21:45,553 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -823931560, now seen corresponding path program 435 times [2021-06-05 22:21:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:45,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496121580] [2021-06-05 22:21:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:45,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:45,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496121580] [2021-06-05 22:21:45,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496121580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:45,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638363639] [2021-06-05 22:21:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:45,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:45,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:45,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:45,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:45,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:45,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:45,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:45,987 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:45,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:45,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:45,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:46,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:46,004 INFO L518 ElimStorePlain]: Eliminatee v_prenex_451 vanished before elimination [2021-06-05 22:21:46,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:46,005 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:46,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638363639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:46,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:46,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:46,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613352273] [2021-06-05 22:21:46,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:46,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:46,035 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:46,330 INFO L93 Difference]: Finished difference Result 313 states and 827 transitions. [2021-06-05 22:21:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:21:46,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:46,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:46,331 INFO L225 Difference]: With dead ends: 313 [2021-06-05 22:21:46,331 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 22:21:46,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:21:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 22:21:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 22:21:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 22:21:46,334 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 22:21:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:46,334 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 22:21:46,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 22:21:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:46,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:46,334 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:46,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14186,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:46,535 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:46,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:46,535 INFO L82 PathProgramCache]: Analyzing trace with hash -81810183, now seen corresponding path program 436 times [2021-06-05 22:21:46,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:46,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970952615] [2021-06-05 22:21:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:46,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:46,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970952615] [2021-06-05 22:21:46,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970952615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:46,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990024863] [2021-06-05 22:21:46,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:46,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:46,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:46,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:46,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:46,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:46,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:46,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:46,840 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:46,840 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:46,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:46,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:46,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990024863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:46,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:46,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271080487] [2021-06-05 22:21:46,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:46,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:46,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:46,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:46,864 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:47,080 INFO L93 Difference]: Finished difference Result 335 states and 875 transitions. [2021-06-05 22:21:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:47,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:47,080 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:21:47,080 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:21:47,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:21:47,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2021-06-05 22:21:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 22:21:47,083 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 22:21:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:47,083 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 22:21:47,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 22:21:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:47,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:47,084 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:47,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14203,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:47,284 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1317532973, now seen corresponding path program 437 times [2021-06-05 22:21:47,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:47,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377802837] [2021-06-05 22:21:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:47,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:47,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377802837] [2021-06-05 22:21:47,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377802837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:47,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457863018] [2021-06-05 22:21:47,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:47,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:21:47,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:47,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:47,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:47,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:47,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:47,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:47,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:47,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:47,601 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:21:47,601 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:47,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:47,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:21:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457863018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:47,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:47,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284320465] [2021-06-05 22:21:47,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:47,650 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:48,091 INFO L93 Difference]: Finished difference Result 354 states and 905 transitions. [2021-06-05 22:21:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:21:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:48,092 INFO L225 Difference]: With dead ends: 354 [2021-06-05 22:21:48,092 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:21:48,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:21:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:21:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 300. [2021-06-05 22:21:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 22:21:48,095 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 22:21:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:48,095 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 22:21:48,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 22:21:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:48,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:48,095 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:48,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14207 [2021-06-05 22:21:48,296 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1764870696, now seen corresponding path program 438 times [2021-06-05 22:21:48,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:48,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799192805] [2021-06-05 22:21:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:48,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799192805] [2021-06-05 22:21:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799192805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:48,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223513086] [2021-06-05 22:21:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:48,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:21:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:48,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:48,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:48,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:48,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:48,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:48,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:48,648 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:21:48,648 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:48,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:21:48,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:48,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:48,666 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 22:21:48,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:48,667 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:21:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223513086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616114662] [2021-06-05 22:21:48,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:48,725 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:48,930 INFO L93 Difference]: Finished difference Result 312 states and 828 transitions. [2021-06-05 22:21:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:21:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:48,931 INFO L225 Difference]: With dead ends: 312 [2021-06-05 22:21:48,931 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 22:21:48,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:21:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 22:21:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 300. [2021-06-05 22:21:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 22:21:48,934 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 22:21:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:48,934 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 22:21:48,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 22:21:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:48,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:48,935 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:49,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14215,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:49,135 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:49,135 INFO L82 PathProgramCache]: Analyzing trace with hash 547299355, now seen corresponding path program 439 times [2021-06-05 22:21:49,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:49,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485158213] [2021-06-05 22:21:49,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:49,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:49,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485158213] [2021-06-05 22:21:49,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485158213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:49,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527196838] [2021-06-05 22:21:49,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:49,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:49,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:49,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:49,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:49,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:49,431 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:21:49,432 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:49,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:49,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:21:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:49,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527196838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:49,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:49,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369200005] [2021-06-05 22:21:49,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:49,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:49,503 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:49,972 INFO L93 Difference]: Finished difference Result 335 states and 872 transitions. [2021-06-05 22:21:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:21:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:49,973 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:21:49,973 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 22:21:49,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:21:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 22:21:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2021-06-05 22:21:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.705084745762712) internal successors, (798), 295 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 798 transitions. [2021-06-05 22:21:49,976 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 798 transitions. Word has length 19 [2021-06-05 22:21:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:49,976 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 798 transitions. [2021-06-05 22:21:49,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 798 transitions. [2021-06-05 22:21:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:49,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:49,976 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:50,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14232,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:50,177 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash 222503102, now seen corresponding path program 440 times [2021-06-05 22:21:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:50,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107683494] [2021-06-05 22:21:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:50,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:50,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107683494] [2021-06-05 22:21:50,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107683494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:50,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790585774] [2021-06-05 22:21:50,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:50,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:50,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:50,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:50,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:50,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:50,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:50,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:50,630 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:50,630 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:50,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:50,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:50,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:50,647 INFO L518 ElimStorePlain]: Eliminatee v_prenex_461 vanished before elimination [2021-06-05 22:21:50,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:50,648 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790585774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:50,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:50,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022769012] [2021-06-05 22:21:50,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:50,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:50,678 INFO L87 Difference]: Start difference. First operand 296 states and 798 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:51,240 INFO L93 Difference]: Finished difference Result 361 states and 898 transitions. [2021-06-05 22:21:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:21:51,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:51,241 INFO L225 Difference]: With dead ends: 361 [2021-06-05 22:21:51,241 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 22:21:51,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:21:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 22:21:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 302. [2021-06-05 22:21:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.6877076411960132) internal successors, (809), 301 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 809 transitions. [2021-06-05 22:21:51,245 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 809 transitions. Word has length 19 [2021-06-05 22:21:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:51,245 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 809 transitions. [2021-06-05 22:21:51,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 809 transitions. [2021-06-05 22:21:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:51,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:51,246 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:51,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14243,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:51,446 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:51,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1753429309, now seen corresponding path program 441 times [2021-06-05 22:21:51,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:51,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790120823] [2021-06-05 22:21:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790120823] [2021-06-05 22:21:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790120823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489852440] [2021-06-05 22:21:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:51,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:21:51,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:51,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:51,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:51,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:51,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:51,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:51,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:51,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:51,743 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:51,743 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:51,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:51,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:51,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489852440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:51,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:51,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:51,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977068081] [2021-06-05 22:21:51,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:51,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:51,767 INFO L87 Difference]: Start difference. First operand 302 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:52,220 INFO L93 Difference]: Finished difference Result 442 states and 1075 transitions. [2021-06-05 22:21:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:21:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:52,221 INFO L225 Difference]: With dead ends: 442 [2021-06-05 22:21:52,221 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 22:21:52,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:21:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 22:21:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 317. [2021-06-05 22:21:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6962025316455698) internal successors, (852), 316 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 852 transitions. [2021-06-05 22:21:52,225 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 852 transitions. Word has length 19 [2021-06-05 22:21:52,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:52,226 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 852 transitions. [2021-06-05 22:21:52,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:52,226 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 852 transitions. [2021-06-05 22:21:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:52,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:52,226 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:52,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14269 [2021-06-05 22:21:52,433 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1358607106, now seen corresponding path program 442 times [2021-06-05 22:21:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:52,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148784305] [2021-06-05 22:21:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:52,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:52,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148784305] [2021-06-05 22:21:52,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148784305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:52,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126784587] [2021-06-05 22:21:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:52,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:21:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:52,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:21:52,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:52,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:52,834 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:21:52,834 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:52,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:52,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:52,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:52,851 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-06-05 22:21:52,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:21:52,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:21:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:52,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126784587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:52,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:52,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938302965] [2021-06-05 22:21:52,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:52,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:52,882 INFO L87 Difference]: Start difference. First operand 317 states and 852 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:53,538 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-06-05 22:21:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:21:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:53,539 INFO L225 Difference]: With dead ends: 370 [2021-06-05 22:21:53,539 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:21:53,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:21:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:21:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2021-06-05 22:21:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.689873417721519) internal successors, (850), 316 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 850 transitions. [2021-06-05 22:21:53,542 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 850 transitions. Word has length 19 [2021-06-05 22:21:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:53,542 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 850 transitions. [2021-06-05 22:21:53,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 850 transitions. [2021-06-05 22:21:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:53,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:53,543 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:53,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14273,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:53,743 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2100728483, now seen corresponding path program 443 times [2021-06-05 22:21:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:53,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234371560] [2021-06-05 22:21:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:53,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234371560] [2021-06-05 22:21:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234371560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991968780] [2021-06-05 22:21:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:53,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:21:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:53,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:54,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:54,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:54,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:54,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:54,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:54,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:54,044 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:21:54,044 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:54,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:21:54,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:21:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:54,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991968780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:54,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:54,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452467193] [2021-06-05 22:21:54,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:54,068 INFO L87 Difference]: Start difference. First operand 317 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:55,301 INFO L93 Difference]: Finished difference Result 437 states and 1062 transitions. [2021-06-05 22:21:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:21:55,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:55,302 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:21:55,302 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 22:21:55,302 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1064.9ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:21:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 22:21:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 290. [2021-06-05 22:21:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.671280276816609) internal successors, (772), 289 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 772 transitions. [2021-06-05 22:21:55,305 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 772 transitions. Word has length 19 [2021-06-05 22:21:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:55,306 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 772 transitions. [2021-06-05 22:21:55,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 772 transitions. [2021-06-05 22:21:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:55,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:55,306 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:55,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14290 [2021-06-05 22:21:55,506 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1118160958, now seen corresponding path program 444 times [2021-06-05 22:21:55,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:55,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078502638] [2021-06-05 22:21:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:55,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:55,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078502638] [2021-06-05 22:21:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078502638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:55,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993650351] [2021-06-05 22:21:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:55,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:21:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:55,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:55,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:55,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:55,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:55,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:55,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:55,833 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:21:55,834 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:55,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:21:55,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:55,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:55,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-06-05 22:21:55,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:55,853 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:21:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993650351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:55,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:55,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:55,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930886495] [2021-06-05 22:21:55,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:55,917 INFO L87 Difference]: Start difference. First operand 290 states and 772 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:56,777 INFO L93 Difference]: Finished difference Result 356 states and 890 transitions. [2021-06-05 22:21:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:21:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:56,778 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:21:56,778 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 22:21:56,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:21:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 22:21:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 293. [2021-06-05 22:21:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 22:21:56,781 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 22:21:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:56,781 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 22:21:56,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 22:21:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:56,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:56,781 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:56,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14294 [2021-06-05 22:21:56,982 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:56,982 INFO L82 PathProgramCache]: Analyzing trace with hash 865005693, now seen corresponding path program 445 times [2021-06-05 22:21:56,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:56,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59775436] [2021-06-05 22:21:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:57,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59775436] [2021-06-05 22:21:57,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59775436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010228712] [2021-06-05 22:21:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:57,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:57,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:57,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:57,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:57,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:21:57,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:57,254 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:21:57,254 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:57,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:57,255 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:21:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010228712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:57,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:57,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911519667] [2021-06-05 22:21:57,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:57,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:57,303 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:58,838 INFO L93 Difference]: Finished difference Result 496 states and 1175 transitions. [2021-06-05 22:21:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:21:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:58,839 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:21:58,839 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 22:21:58,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1394.1ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:21:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 22:21:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 293. [2021-06-05 22:21:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 22:21:58,844 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 22:21:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:58,844 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 22:21:58,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 22:21:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:58,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:58,845 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:21:59,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14313 [2021-06-05 22:21:59,057 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:21:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:21:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 417667970, now seen corresponding path program 446 times [2021-06-05 22:21:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:21:59,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599173777] [2021-06-05 22:21:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:21:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:21:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:59,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:21:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599173777] [2021-06-05 22:21:59,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599173777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628150097] [2021-06-05 22:21:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:21:59,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:21:59,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:21:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:21:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:21:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:21:59,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:59,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:21:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:21:59,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:59,382 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:21:59,382 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:21:59,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:21:59,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:21:59,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:21:59,400 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 22:21:59,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:21:59,401 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:21:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:21:59,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628150097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:21:59,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:21:59,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:21:59,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776178166] [2021-06-05 22:21:59,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:21:59,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:21:59,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:21:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:21:59,458 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:21:59,979 INFO L93 Difference]: Finished difference Result 326 states and 842 transitions. [2021-06-05 22:21:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:21:59,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:21:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:21:59,980 INFO L225 Difference]: With dead ends: 326 [2021-06-05 22:21:59,980 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:21:59,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:21:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:21:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2021-06-05 22:21:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.6724137931034484) internal successors, (775), 290 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 775 transitions. [2021-06-05 22:21:59,983 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 775 transitions. Word has length 19 [2021-06-05 22:21:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:21:59,983 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 775 transitions. [2021-06-05 22:21:59,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:21:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 775 transitions. [2021-06-05 22:21:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:21:59,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:21:59,984 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:00,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14321,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:00,184 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1565129275, now seen corresponding path program 447 times [2021-06-05 22:22:00,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:00,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185953778] [2021-06-05 22:22:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:00,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:00,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185953778] [2021-06-05 22:22:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185953778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:00,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204436879] [2021-06-05 22:22:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:00,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:22:00,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:00,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:00,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:00,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:00,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:00,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:00,454 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:00,454 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:00,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:00,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204436879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:00,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:00,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:00,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293109347] [2021-06-05 22:22:00,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:00,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:00,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:00,524 INFO L87 Difference]: Start difference. First operand 291 states and 775 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:02,381 INFO L93 Difference]: Finished difference Result 433 states and 1057 transitions. [2021-06-05 22:22:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:22:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:02,382 INFO L225 Difference]: With dead ends: 433 [2021-06-05 22:22:02,382 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 22:22:02,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1690.7ms TimeCoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:22:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 22:22:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 287. [2021-06-05 22:22:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6783216783216783) internal successors, (766), 286 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 766 transitions. [2021-06-05 22:22:02,385 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 766 transitions. Word has length 19 [2021-06-05 22:22:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:02,385 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 766 transitions. [2021-06-05 22:22:02,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 766 transitions. [2021-06-05 22:22:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:02,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:02,386 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:02,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14338 [2021-06-05 22:22:02,586 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1896124392, now seen corresponding path program 448 times [2021-06-05 22:22:02,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:02,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67210988] [2021-06-05 22:22:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:02,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:02,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67210988] [2021-06-05 22:22:02,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67210988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:02,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834189801] [2021-06-05 22:22:02,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:02,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:02,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:02,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:02,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:02,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:02,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:02,965 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:02,965 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:02,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:02,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:02,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:02,982 INFO L518 ElimStorePlain]: Eliminatee v_prenex_476 vanished before elimination [2021-06-05 22:22:02,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:02,983 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:03,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834189801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:03,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:03,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340732132] [2021-06-05 22:22:03,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:03,012 INFO L87 Difference]: Start difference. First operand 287 states and 766 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:03,738 INFO L93 Difference]: Finished difference Result 422 states and 1037 transitions. [2021-06-05 22:22:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:22:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:03,738 INFO L225 Difference]: With dead ends: 422 [2021-06-05 22:22:03,739 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 22:22:03,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:22:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 22:22:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 316. [2021-06-05 22:22:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7111111111111112) internal successors, (854), 315 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 854 transitions. [2021-06-05 22:22:03,742 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 854 transitions. Word has length 19 [2021-06-05 22:22:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 854 transitions. [2021-06-05 22:22:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 854 transitions. [2021-06-05 22:22:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:03,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:03,743 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:03,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14349 [2021-06-05 22:22:03,943 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1154003015, now seen corresponding path program 449 times [2021-06-05 22:22:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:03,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438210141] [2021-06-05 22:22:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:04,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:04,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438210141] [2021-06-05 22:22:04,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438210141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:04,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789176975] [2021-06-05 22:22:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:04,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:04,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:04,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:04,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:04,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:04,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:04,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:04,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:04,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:04,210 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:04,210 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:04,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:04,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789176975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:04,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:04,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142205094] [2021-06-05 22:22:04,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:04,234 INFO L87 Difference]: Start difference. First operand 316 states and 854 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:04,827 INFO L93 Difference]: Finished difference Result 579 states and 1352 transitions. [2021-06-05 22:22:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:22:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:04,828 INFO L225 Difference]: With dead ends: 579 [2021-06-05 22:22:04,828 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 22:22:04,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:22:04,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 22:22:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 326. [2021-06-05 22:22:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.72) internal successors, (884), 325 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 884 transitions. [2021-06-05 22:22:04,832 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 884 transitions. Word has length 19 [2021-06-05 22:22:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:04,832 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 884 transitions. [2021-06-05 22:22:04,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 884 transitions. [2021-06-05 22:22:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:04,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:04,833 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:05,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14366,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:05,033 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2136570540, now seen corresponding path program 450 times [2021-06-05 22:22:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238214460] [2021-06-05 22:22:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:05,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:05,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238214460] [2021-06-05 22:22:05,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238214460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:05,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449932245] [2021-06-05 22:22:05,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:05,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:05,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:05,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:05,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:05,338 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:22:05,338 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:05,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:05,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:05,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:05,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-06-05 22:22:05,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:05,357 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449932245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:05,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:05,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317937535] [2021-06-05 22:22:05,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:05,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:05,420 INFO L87 Difference]: Start difference. First operand 326 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:06,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:06,664 INFO L93 Difference]: Finished difference Result 585 states and 1337 transitions. [2021-06-05 22:22:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:22:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:06,665 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:22:06,665 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 22:22:06,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 970.8ms TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:22:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 22:22:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 22:22:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 22:22:06,669 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 22:22:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:06,669 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 22:22:06,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:06,669 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 22:22:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:06,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:06,669 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:06,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14370 [2021-06-05 22:22:06,870 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1905241491, now seen corresponding path program 451 times [2021-06-05 22:22:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:06,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295676230] [2021-06-05 22:22:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:06,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:06,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295676230] [2021-06-05 22:22:06,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295676230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:06,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454440208] [2021-06-05 22:22:06,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:06,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:07,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:07,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:07,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:07,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:07,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:07,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:07,148 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:07,148 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:07,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:07,149 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:07,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454440208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:07,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:07,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627338594] [2021-06-05 22:22:07,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:07,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:07,196 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:08,719 INFO L93 Difference]: Finished difference Result 724 states and 1605 transitions. [2021-06-05 22:22:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:22:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:08,720 INFO L225 Difference]: With dead ends: 724 [2021-06-05 22:22:08,720 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 22:22:08,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1201.8ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:22:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 22:22:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 329. [2021-06-05 22:22:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.7195121951219514) internal successors, (892), 328 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 892 transitions. [2021-06-05 22:22:08,725 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 892 transitions. Word has length 19 [2021-06-05 22:22:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:08,725 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 892 transitions. [2021-06-05 22:22:08,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 892 transitions. [2021-06-05 22:22:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:08,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:08,725 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:08,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14389 [2021-06-05 22:22:08,926 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1457903768, now seen corresponding path program 452 times [2021-06-05 22:22:08,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:08,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668952282] [2021-06-05 22:22:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:09,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:09,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668952282] [2021-06-05 22:22:09,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668952282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:09,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299451097] [2021-06-05 22:22:09,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:09,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:09,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:09,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:09,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:09,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:09,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:09,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:09,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:09,221 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:22:09,221 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:09,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:09,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:09,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:09,239 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-06-05 22:22:09,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:09,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:09,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299451097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:09,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:09,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:09,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116277719] [2021-06-05 22:22:09,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:09,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:09,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:09,296 INFO L87 Difference]: Start difference. First operand 329 states and 892 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:09,880 INFO L93 Difference]: Finished difference Result 477 states and 1158 transitions. [2021-06-05 22:22:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:09,881 INFO L225 Difference]: With dead ends: 477 [2021-06-05 22:22:09,881 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 22:22:09,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:22:09,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 22:22:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 324. [2021-06-05 22:22:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 22:22:09,885 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 22:22:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:09,885 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 22:22:09,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 22:22:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:09,886 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:09,886 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:10,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14397,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:10,086 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash -524893477, now seen corresponding path program 453 times [2021-06-05 22:22:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:10,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350573598] [2021-06-05 22:22:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:10,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350573598] [2021-06-05 22:22:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350573598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:10,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828039443] [2021-06-05 22:22:10,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:10,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:22:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:10,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:10,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:10,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:10,336 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:10,337 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:10,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:10,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828039443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:10,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:10,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:10,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336024027] [2021-06-05 22:22:10,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:10,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:10,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:10,406 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:12,332 INFO L93 Difference]: Finished difference Result 649 states and 1474 transitions. [2021-06-05 22:22:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:22:12,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:12,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:12,333 INFO L225 Difference]: With dead ends: 649 [2021-06-05 22:22:12,333 INFO L226 Difference]: Without dead ends: 645 [2021-06-05 22:22:12,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1605.1ms TimeCoverageRelationStatistics Valid=496, Invalid=4196, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:22:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-05 22:22:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 318. [2021-06-05 22:22:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.7003154574132493) internal successors, (856), 317 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 856 transitions. [2021-06-05 22:22:12,337 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 856 transitions. Word has length 19 [2021-06-05 22:22:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:12,338 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 856 transitions. [2021-06-05 22:22:12,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 856 transitions. [2021-06-05 22:22:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:12,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:12,338 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:12,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14408 [2021-06-05 22:22:12,539 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:12,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1548825218, now seen corresponding path program 454 times [2021-06-05 22:22:12,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:12,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33013014] [2021-06-05 22:22:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:12,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:12,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33013014] [2021-06-05 22:22:12,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33013014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:12,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356638554] [2021-06-05 22:22:12,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:12,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:12,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:12,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:12,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:12,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:12,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:12,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:12,786 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:22:12,787 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:12,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:12,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:12,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356638554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:12,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:12,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:12,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566096949] [2021-06-05 22:22:12,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:12,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:12,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:12,841 INFO L87 Difference]: Start difference. First operand 318 states and 856 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:13,570 INFO L93 Difference]: Finished difference Result 584 states and 1361 transitions. [2021-06-05 22:22:13,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:22:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:13,571 INFO L225 Difference]: With dead ends: 584 [2021-06-05 22:22:13,571 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 22:22:13,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:22:13,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 22:22:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 333. [2021-06-05 22:22:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 22:22:13,575 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 22:22:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:13,575 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 22:22:13,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 22:22:13,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:13,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:13,575 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:13,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14419,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:13,776 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1801980483, now seen corresponding path program 455 times [2021-06-05 22:22:13,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:13,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879218741] [2021-06-05 22:22:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:13,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879218741] [2021-06-05 22:22:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879218741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749415695] [2021-06-05 22:22:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:13,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:14,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:14,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:14,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:14,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:14,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:14,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:14,044 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:22:14,044 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:14,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:14,045 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:22:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749415695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511342437] [2021-06-05 22:22:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:14,091 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:14,605 INFO L93 Difference]: Finished difference Result 542 states and 1292 transitions. [2021-06-05 22:22:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:22:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:14,606 INFO L225 Difference]: With dead ends: 542 [2021-06-05 22:22:14,606 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 22:22:14,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:14,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 22:22:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 333. [2021-06-05 22:22:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 22:22:14,610 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 22:22:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:14,610 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 22:22:14,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 22:22:14,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:14,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:14,610 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:14,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14430,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:14,811 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:14,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649090, now seen corresponding path program 456 times [2021-06-05 22:22:14,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:14,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766133020] [2021-06-05 22:22:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:14,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:14,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766133020] [2021-06-05 22:22:14,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766133020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:14,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584979881] [2021-06-05 22:22:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:14,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:15,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:15,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:15,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:15,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:15,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:15,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:15,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:15,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:15,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:15,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:15,064 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:22:15,064 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:15,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:15,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:15,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584979881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:15,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:15,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:15,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531962842] [2021-06-05 22:22:15,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:15,110 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:15,588 INFO L93 Difference]: Finished difference Result 563 states and 1329 transitions. [2021-06-05 22:22:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:15,589 INFO L225 Difference]: With dead ends: 563 [2021-06-05 22:22:15,589 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:22:15,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:22:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:22:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 330. [2021-06-05 22:22:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.723404255319149) internal successors, (896), 329 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 896 transitions. [2021-06-05 22:22:15,593 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 896 transitions. Word has length 19 [2021-06-05 22:22:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:15,593 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 896 transitions. [2021-06-05 22:22:15,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 896 transitions. [2021-06-05 22:22:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:15,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:15,594 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:15,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14446,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:15,794 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash 62851845, now seen corresponding path program 457 times [2021-06-05 22:22:15,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:15,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401250710] [2021-06-05 22:22:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:15,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:15,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401250710] [2021-06-05 22:22:15,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401250710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:15,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217208581] [2021-06-05 22:22:15,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:16,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:16,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:16,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:16,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:16,074 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:22:16,075 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:16,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:16,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:22:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217208581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:16,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:16,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885090690] [2021-06-05 22:22:16,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:16,144 INFO L87 Difference]: Start difference. First operand 330 states and 896 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:16,745 INFO L93 Difference]: Finished difference Result 529 states and 1260 transitions. [2021-06-05 22:22:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:22:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:16,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:16,746 INFO L225 Difference]: With dead ends: 529 [2021-06-05 22:22:16,746 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 22:22:16,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:22:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 22:22:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-06-05 22:22:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.7208588957055215) internal successors, (887), 326 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 887 transitions. [2021-06-05 22:22:16,750 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 887 transitions. Word has length 19 [2021-06-05 22:22:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:16,750 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 887 transitions. [2021-06-05 22:22:16,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 887 transitions. [2021-06-05 22:22:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:16,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:16,751 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:16,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14455 [2021-06-05 22:22:16,951 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1510419288, now seen corresponding path program 458 times [2021-06-05 22:22:16,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:16,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745465046] [2021-06-05 22:22:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:17,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745465046] [2021-06-05 22:22:17,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745465046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:17,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768861996] [2021-06-05 22:22:17,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:17,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:17,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:17,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:17,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:17,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:17,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:17,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:17,191 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:22:17,191 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:17,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:17,192 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:22:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768861996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074931010] [2021-06-05 22:22:17,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:17,216 INFO L87 Difference]: Start difference. First operand 327 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:17,651 INFO L93 Difference]: Finished difference Result 519 states and 1238 transitions. [2021-06-05 22:22:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:22:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:17,652 INFO L225 Difference]: With dead ends: 519 [2021-06-05 22:22:17,652 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 22:22:17,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:22:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 22:22:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 323. [2021-06-05 22:22:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.7111801242236027) internal successors, (873), 322 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 873 transitions. [2021-06-05 22:22:17,656 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 873 transitions. Word has length 19 [2021-06-05 22:22:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:17,656 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 873 transitions. [2021-06-05 22:22:17,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 873 transitions. [2021-06-05 22:22:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:17,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:17,657 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:17,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14474,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:17,857 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1138563001, now seen corresponding path program 459 times [2021-06-05 22:22:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:17,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396428809] [2021-06-05 22:22:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:17,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:17,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396428809] [2021-06-05 22:22:17,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396428809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:17,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338753113] [2021-06-05 22:22:17,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:17,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:22:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:17,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:18,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:18,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:18,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:18,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:18,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:18,146 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:22:18,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:18,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:18,147 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:22:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:18,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338753113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:18,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:18,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:22:18,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703403995] [2021-06-05 22:22:18,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:18,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:18,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:18,177 INFO L87 Difference]: Start difference. First operand 323 states and 873 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:18,654 INFO L93 Difference]: Finished difference Result 460 states and 1121 transitions. [2021-06-05 22:22:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:22:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:18,655 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:22:18,655 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 22:22:18,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 22:22:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 321. [2021-06-05 22:22:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 22:22:18,658 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 22:22:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:18,658 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 22:22:18,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 22:22:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:18,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:18,659 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:18,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14478 [2021-06-05 22:22:18,859 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:18,860 INFO L82 PathProgramCache]: Analyzing trace with hash 218819306, now seen corresponding path program 460 times [2021-06-05 22:22:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:18,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329152633] [2021-06-05 22:22:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329152633] [2021-06-05 22:22:18,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329152633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091666781] [2021-06-05 22:22:18,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:18,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:18,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:18,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:19,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:19,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:19,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:19,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:19,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:19,324 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:19,324 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:19,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:19,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:19,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-06-05 22:22:19,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:19,342 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091666781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:19,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:19,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:19,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976220842] [2021-06-05 22:22:19,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:19,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:19,373 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:19,632 INFO L93 Difference]: Finished difference Result 360 states and 930 transitions. [2021-06-05 22:22:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:19,633 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:22:19,633 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:22:19,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:22:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:22:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-06-05 22:22:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 22:22:19,636 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 22:22:19,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:19,636 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 22:22:19,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:19,636 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 22:22:19,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:19,637 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:19,637 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:19,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14491 [2021-06-05 22:22:19,837 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 432891467, now seen corresponding path program 461 times [2021-06-05 22:22:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:19,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348330710] [2021-06-05 22:22:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:19,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:19,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348330710] [2021-06-05 22:22:19,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348330710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:19,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583935537] [2021-06-05 22:22:19,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:19,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:19,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:19,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:20,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:20,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:20,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:20,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:20,146 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:20,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:20,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:20,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:20,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583935537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:20,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:20,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:20,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265524126] [2021-06-05 22:22:20,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:20,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:20,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:20,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:20,171 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:20,377 INFO L93 Difference]: Finished difference Result 368 states and 958 transitions. [2021-06-05 22:22:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:20,378 INFO L225 Difference]: With dead ends: 368 [2021-06-05 22:22:20,378 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:22:20,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:22:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:22:20,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 322. [2021-06-05 22:22:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 22:22:20,382 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 22:22:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:20,382 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 22:22:20,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 22:22:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:20,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:20,382 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:20,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14508,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:20,583 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:20,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1078305062, now seen corresponding path program 462 times [2021-06-05 22:22:20,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:20,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892241518] [2021-06-05 22:22:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:20,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:20,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892241518] [2021-06-05 22:22:20,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892241518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:20,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692736257] [2021-06-05 22:22:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:20,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:22:20,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:21,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:21,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:21,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:21,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,061 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:21,061 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:21,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:21,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:21,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-06-05 22:22:21,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:21,079 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:21,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692736257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:21,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:21,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:21,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805035797] [2021-06-05 22:22:21,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:21,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:21,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:21,109 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:21,408 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 22:22:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:21,409 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:22:21,409 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:22:21,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:22:21,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:22:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2021-06-05 22:22:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 22:22:21,412 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 22:22:21,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:21,412 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 22:22:21,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 22:22:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:21,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:21,413 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:21,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14512 [2021-06-05 22:22:21,613 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1685736027, now seen corresponding path program 463 times [2021-06-05 22:22:21,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:21,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012123463] [2021-06-05 22:22:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:21,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:21,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012123463] [2021-06-05 22:22:21,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012123463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:21,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107389718] [2021-06-05 22:22:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:21,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:21,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:21,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:21,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:21,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:21,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,921 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:21,921 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:21,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:21,922 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107389718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:21,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:21,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014776109] [2021-06-05 22:22:21,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:21,946 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:22,410 INFO L93 Difference]: Finished difference Result 407 states and 1037 transitions. [2021-06-05 22:22:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:22,411 INFO L225 Difference]: With dead ends: 407 [2021-06-05 22:22:22,411 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 22:22:22,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:22:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 22:22:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 22:22:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 22:22:22,418 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 22:22:22,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:22,418 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 22:22:22,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 22:22:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:22,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:22,419 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:22,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14539,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:22,619 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558230, now seen corresponding path program 464 times [2021-06-05 22:22:22,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:22,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990149299] [2021-06-05 22:22:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:22,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990149299] [2021-06-05 22:22:22,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990149299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:22,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146258278] [2021-06-05 22:22:22,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:22,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:22,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:23,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:23,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:23,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:23,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:23,096 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:23,097 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:23,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:23,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:23,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:23,114 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-06-05 22:22:23,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:23,115 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:23,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146258278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:23,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:23,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:23,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844348477] [2021-06-05 22:22:23,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:23,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:23,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:23,145 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:23,523 INFO L93 Difference]: Finished difference Result 352 states and 918 transitions. [2021-06-05 22:22:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:23,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:23,523 INFO L225 Difference]: With dead ends: 352 [2021-06-05 22:22:23,523 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:22:23,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:22:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2021-06-05 22:22:23,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 22:22:23,527 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 22:22:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:23,527 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 22:22:23,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 22:22:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:23,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:23,527 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:23,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14543 [2021-06-05 22:22:23,728 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1338436853, now seen corresponding path program 465 times [2021-06-05 22:22:23,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:23,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847496210] [2021-06-05 22:22:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:23,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:23,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847496210] [2021-06-05 22:22:23,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847496210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:23,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414760359] [2021-06-05 22:22:23,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:23,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:22:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:24,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:24,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:24,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:24,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:24,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:24,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:24,052 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:24,052 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:24,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:24,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:24,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414760359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:24,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:24,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81569130] [2021-06-05 22:22:24,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:24,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:24,077 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:25,092 INFO L93 Difference]: Finished difference Result 427 states and 1076 transitions. [2021-06-05 22:22:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:25,093 INFO L225 Difference]: With dead ends: 427 [2021-06-05 22:22:25,093 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 22:22:25,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:22:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 22:22:25,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 324. [2021-06-05 22:22:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.696594427244582) internal successors, (871), 323 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 871 transitions. [2021-06-05 22:22:25,097 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 871 transitions. Word has length 19 [2021-06-05 22:22:25,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:25,097 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 871 transitions. [2021-06-05 22:22:25,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 871 transitions. [2021-06-05 22:22:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:25,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:25,097 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:25,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14569,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:25,298 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:25,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:25,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1973962918, now seen corresponding path program 466 times [2021-06-05 22:22:25,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:25,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876692253] [2021-06-05 22:22:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:25,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:25,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876692253] [2021-06-05 22:22:25,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876692253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:25,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057465754] [2021-06-05 22:22:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:25,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:25,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:25,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:25,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:25,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:25,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:25,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:25,649 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:22:25,649 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:25,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:25,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:25,667 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-06-05 22:22:25,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:25,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057465754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:25,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:25,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597601543] [2021-06-05 22:22:25,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:25,743 INFO L87 Difference]: Start difference. First operand 324 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:26,478 INFO L93 Difference]: Finished difference Result 387 states and 978 transitions. [2021-06-05 22:22:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:26,478 INFO L225 Difference]: With dead ends: 387 [2021-06-05 22:22:26,478 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 22:22:26,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 672.0ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 22:22:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 326. [2021-06-05 22:22:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 22:22:26,482 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 22:22:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:26,482 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 22:22:26,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 22:22:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:26,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:26,482 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:26,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14573,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:26,683 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1720807653, now seen corresponding path program 467 times [2021-06-05 22:22:26,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:26,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830895162] [2021-06-05 22:22:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830895162] [2021-06-05 22:22:26,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830895162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:26,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585476060] [2021-06-05 22:22:26,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:26,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:26,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:26,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:26,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:26,989 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:26,990 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:26,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:26,990 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:27,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585476060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:27,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:27,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:27,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15224168] [2021-06-05 22:22:27,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:27,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:27,039 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:28,164 INFO L93 Difference]: Finished difference Result 451 states and 1113 transitions. [2021-06-05 22:22:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:28,165 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:22:28,165 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 22:22:28,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1013.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:22:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 22:22:28,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 326. [2021-06-05 22:22:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 22:22:28,169 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 22:22:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:28,169 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 22:22:28,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 22:22:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:28,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:28,170 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:28,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14586,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:28,370 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1273469930, now seen corresponding path program 468 times [2021-06-05 22:22:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:28,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276330128] [2021-06-05 22:22:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:28,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:28,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276330128] [2021-06-05 22:22:28,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276330128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:28,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233258327] [2021-06-05 22:22:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:28,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:28,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:28,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:28,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:28,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:28,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,742 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:22:28,743 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-06-05 22:22:28,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:28,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:28,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:28,761 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:28,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:28,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:28,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233258327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:28,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:28,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:28,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324992549] [2021-06-05 22:22:28,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:28,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:28,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:28,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:28,821 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:29,201 INFO L93 Difference]: Finished difference Result 357 states and 936 transitions. [2021-06-05 22:22:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:29,201 INFO L225 Difference]: With dead ends: 357 [2021-06-05 22:22:29,201 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:22:29,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:22:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:22:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-06-05 22:22:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.697530864197531) internal successors, (874), 324 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 874 transitions. [2021-06-05 22:22:29,205 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 874 transitions. Word has length 19 [2021-06-05 22:22:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:29,205 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 874 transitions. [2021-06-05 22:22:29,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 874 transitions. [2021-06-05 22:22:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:29,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:29,205 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:29,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14594,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:29,406 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -709327315, now seen corresponding path program 469 times [2021-06-05 22:22:29,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:29,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285145860] [2021-06-05 22:22:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:29,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:29,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285145860] [2021-06-05 22:22:29,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285145860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:29,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880957789] [2021-06-05 22:22:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:29,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:29,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:29,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:29,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:29,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:29,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:29,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:29,733 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:29,733 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:29,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:29,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:29,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880957789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:29,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:29,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:29,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814120141] [2021-06-05 22:22:29,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:29,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:29,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:29,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:29,826 INFO L87 Difference]: Start difference. First operand 325 states and 874 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:31,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:31,255 INFO L93 Difference]: Finished difference Result 400 states and 1019 transitions. [2021-06-05 22:22:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:22:31,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:31,255 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:22:31,256 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 22:22:31,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1306.8ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:22:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 22:22:31,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 321. [2021-06-05 22:22:31,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 22:22:31,259 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 22:22:31,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:31,259 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 22:22:31,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:31,259 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 22:22:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:31,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:31,259 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:31,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14605,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:31,460 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:31,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:31,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2094901658, now seen corresponding path program 470 times [2021-06-05 22:22:31,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509465971] [2021-06-05 22:22:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:31,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509465971] [2021-06-05 22:22:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509465971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130415417] [2021-06-05 22:22:31,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:31,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:31,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:31,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:31,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:31,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:31,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:31,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:31,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:31,884 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:31,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:31,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:31,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:31,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:31,901 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 22:22:31,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:31,902 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:31,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130415417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:31,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:31,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447971842] [2021-06-05 22:22:31,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:31,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:31,932 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:32,235 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 22:22:32,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:32,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:32,236 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:22:32,236 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:22:32,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:22:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:22:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 321. [2021-06-05 22:22:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.696875) internal successors, (863), 320 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 863 transitions. [2021-06-05 22:22:32,239 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 863 transitions. Word has length 19 [2021-06-05 22:22:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:32,239 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 863 transitions. [2021-06-05 22:22:32,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 863 transitions. [2021-06-05 22:22:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:32,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:32,240 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:32,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14616 [2021-06-05 22:22:32,440 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash -563975451, now seen corresponding path program 471 times [2021-06-05 22:22:32,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:32,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643964063] [2021-06-05 22:22:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:32,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:32,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643964063] [2021-06-05 22:22:32,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643964063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:32,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460475668] [2021-06-05 22:22:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:32,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:22:32,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:32,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:32,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:32,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:32,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:32,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:32,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:32,715 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:32,715 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:32,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:32,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:32,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460475668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:32,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:32,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:32,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423506472] [2021-06-05 22:22:32,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:32,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:32,738 INFO L87 Difference]: Start difference. First operand 321 states and 863 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:33,013 INFO L93 Difference]: Finished difference Result 416 states and 1055 transitions. [2021-06-05 22:22:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:22:33,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:33,014 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:22:33,014 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 22:22:33,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:22:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 22:22:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 324. [2021-06-05 22:22:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 22:22:33,017 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 22:22:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:33,017 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 22:22:33,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 22:22:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:33,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:33,018 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:33,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14643,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:33,218 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:33,219 INFO L82 PathProgramCache]: Analyzing trace with hash -958797654, now seen corresponding path program 472 times [2021-06-05 22:22:33,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:33,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572033452] [2021-06-05 22:22:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:33,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572033452] [2021-06-05 22:22:33,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572033452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:33,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964955288] [2021-06-05 22:22:33,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:33,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:33,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:33,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:33,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:33,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:33,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:33,657 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:33,657 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 22:22:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:33,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:33,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:33,674 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:33,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:33,675 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:33,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964955288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:33,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:33,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:33,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253633181] [2021-06-05 22:22:33,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:33,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:33,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:33,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:33,704 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:34,051 INFO L93 Difference]: Finished difference Result 356 states and 927 transitions. [2021-06-05 22:22:34,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:22:34,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:34,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:34,052 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:22:34,052 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:22:34,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:22:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:22:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 324. [2021-06-05 22:22:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 22:22:34,055 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 22:22:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:34,056 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 22:22:34,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 22:22:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:34,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:34,056 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:34,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14647 [2021-06-05 22:22:34,257 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -216676277, now seen corresponding path program 473 times [2021-06-05 22:22:34,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:34,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597188539] [2021-06-05 22:22:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:34,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:34,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597188539] [2021-06-05 22:22:34,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597188539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:34,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582121570] [2021-06-05 22:22:34,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:34,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:22:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:34,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:34,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:34,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:34,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:34,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:34,539 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:34,540 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:34,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:34,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:34,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582121570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:34,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:34,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:34,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758637012] [2021-06-05 22:22:34,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:34,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:34,563 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:35,058 INFO L93 Difference]: Finished difference Result 507 states and 1242 transitions. [2021-06-05 22:22:35,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:22:35,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:35,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:35,059 INFO L225 Difference]: With dead ends: 507 [2021-06-05 22:22:35,059 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 22:22:35,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:22:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 22:22:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 324. [2021-06-05 22:22:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 22:22:35,062 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 22:22:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:35,062 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 22:22:35,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 22:22:35,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:35,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:35,063 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:35,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14673,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:35,264 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1199243802, now seen corresponding path program 474 times [2021-06-05 22:22:35,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:35,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296377229] [2021-06-05 22:22:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:35,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:35,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296377229] [2021-06-05 22:22:35,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296377229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:35,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49743377] [2021-06-05 22:22:35,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:35,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:35,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:35,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:35,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:35,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:35,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:35,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:35,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:35,652 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:22:35,653 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:35,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:35,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:35,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:35,671 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-06-05 22:22:35,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:35,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:35,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49743377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:35,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:35,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:35,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064597319] [2021-06-05 22:22:35,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:35,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:35,737 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:36,483 INFO L93 Difference]: Finished difference Result 406 states and 1019 transitions. [2021-06-05 22:22:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:22:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:36,484 INFO L225 Difference]: With dead ends: 406 [2021-06-05 22:22:36,484 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:22:36,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:22:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:22:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 327. [2021-06-05 22:22:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 22:22:36,487 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 22:22:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 22:22:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 22:22:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:36,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:36,488 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:36,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-06-05 22:22:36,688 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:36,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1452399067, now seen corresponding path program 475 times [2021-06-05 22:22:36,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:36,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216005857] [2021-06-05 22:22:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:36,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216005857] [2021-06-05 22:22:36,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216005857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:36,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467908064] [2021-06-05 22:22:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:36,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:36,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:36,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:36,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:36,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:36,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:36,963 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:36,963 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:36,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:36,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:37,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467908064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:37,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:37,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:37,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454151785] [2021-06-05 22:22:37,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:37,011 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:37,872 INFO L93 Difference]: Finished difference Result 578 states and 1379 transitions. [2021-06-05 22:22:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:22:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:37,873 INFO L225 Difference]: With dead ends: 578 [2021-06-05 22:22:37,873 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 22:22:37,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:22:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 22:22:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 327. [2021-06-05 22:22:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 22:22:37,877 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 22:22:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:37,877 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 22:22:37,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 22:22:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:37,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:37,878 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:38,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14690,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:38,078 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1899736790, now seen corresponding path program 476 times [2021-06-05 22:22:38,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:38,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856876623] [2021-06-05 22:22:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:38,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856876623] [2021-06-05 22:22:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856876623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103777209] [2021-06-05 22:22:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:38,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:38,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:38,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:38,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:38,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:38,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:38,401 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:22:38,401 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:38,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:38,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:38,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:38,419 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-06-05 22:22:38,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:38,420 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:38,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103777209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:38,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:38,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:38,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047442955] [2021-06-05 22:22:38,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:38,475 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:38,932 INFO L93 Difference]: Finished difference Result 376 states and 969 transitions. [2021-06-05 22:22:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:22:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:38,933 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:22:38,933 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 22:22:38,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:22:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 22:22:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2021-06-05 22:22:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.691358024691358) internal successors, (872), 324 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 872 transitions. [2021-06-05 22:22:38,936 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 872 transitions. Word has length 19 [2021-06-05 22:22:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:38,936 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 872 transitions. [2021-06-05 22:22:38,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 872 transitions. [2021-06-05 22:22:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:38,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:38,937 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:39,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 22:22:39,137 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash 412433261, now seen corresponding path program 477 times [2021-06-05 22:22:39,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:39,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567374350] [2021-06-05 22:22:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:39,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:39,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567374350] [2021-06-05 22:22:39,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567374350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:39,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994908104] [2021-06-05 22:22:39,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:22:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:39,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:39,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:39,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:39,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:39,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:39,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:39,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:39,422 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:39,422 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:39,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:39,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994908104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658557037] [2021-06-05 22:22:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:39,491 INFO L87 Difference]: Start difference. First operand 325 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:40,510 INFO L93 Difference]: Finished difference Result 494 states and 1225 transitions. [2021-06-05 22:22:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:22:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:40,510 INFO L225 Difference]: With dead ends: 494 [2021-06-05 22:22:40,511 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:22:40,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 991.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:22:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:22:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 321. [2021-06-05 22:22:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.69375) internal successors, (862), 320 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:40,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 862 transitions. [2021-06-05 22:22:40,514 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 862 transitions. Word has length 19 [2021-06-05 22:22:40,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:40,514 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 862 transitions. [2021-06-05 22:22:40,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:40,514 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 862 transitions. [2021-06-05 22:22:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:40,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:40,515 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:40,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14715,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:40,715 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:40,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2030990486, now seen corresponding path program 478 times [2021-06-05 22:22:40,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:40,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196173656] [2021-06-05 22:22:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:40,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:40,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196173656] [2021-06-05 22:22:40,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196173656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:40,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122306546] [2021-06-05 22:22:40,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:40,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:40,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:41,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:41,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:41,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:41,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:41,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:41,140 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:22:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:41,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:41,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:41,157 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-06-05 22:22:41,157 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:41,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:41,173 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:22:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:41,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122306546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:41,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:41,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:41,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174617356] [2021-06-05 22:22:41,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:41,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:41,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:41,208 INFO L87 Difference]: Start difference. First operand 321 states and 862 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:41,768 INFO L93 Difference]: Finished difference Result 392 states and 990 transitions. [2021-06-05 22:22:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:22:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:41,769 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:22:41,769 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 22:22:41,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:41,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 22:22:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 329. [2021-06-05 22:22:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.6951219512195124) internal successors, (884), 328 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 884 transitions. [2021-06-05 22:22:41,772 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 884 transitions. Word has length 19 [2021-06-05 22:22:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:41,772 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 884 transitions. [2021-06-05 22:22:41,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 884 transitions. [2021-06-05 22:22:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:41,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:41,773 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:41,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14726 [2021-06-05 22:22:41,973 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1288869109, now seen corresponding path program 479 times [2021-06-05 22:22:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:41,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268268732] [2021-06-05 22:22:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:42,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268268732] [2021-06-05 22:22:42,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268268732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:42,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056035444] [2021-06-05 22:22:42,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:42,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:42,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:42,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:42,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:42,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:42,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:42,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:42,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:42,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:42,242 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:22:42,242 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:42,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:42,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:22:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:42,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056035444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:42,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:42,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166681980] [2021-06-05 22:22:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:42,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:42,265 INFO L87 Difference]: Start difference. First operand 329 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:42,653 INFO L93 Difference]: Finished difference Result 466 states and 1147 transitions. [2021-06-05 22:22:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:22:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:42,654 INFO L225 Difference]: With dead ends: 466 [2021-06-05 22:22:42,654 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 22:22:42,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:22:42,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 22:22:42,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 330. [2021-06-05 22:22:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.6990881458966567) internal successors, (888), 329 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2021-06-05 22:22:42,658 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 19 [2021-06-05 22:22:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:42,658 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2021-06-05 22:22:42,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2021-06-05 22:22:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:42,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:42,659 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:42,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14752,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:42,859 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:42,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2023530662, now seen corresponding path program 480 times [2021-06-05 22:22:42,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:42,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611068519] [2021-06-05 22:22:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:42,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:42,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611068519] [2021-06-05 22:22:42,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611068519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:42,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947414380] [2021-06-05 22:22:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:42,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:42,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:43,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:43,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:43,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:43,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:43,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:43,163 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:22:43,164 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:43,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:43,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:43,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-06-05 22:22:43,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:43,183 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:43,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947414380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:43,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:43,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359565153] [2021-06-05 22:22:43,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:43,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:43,245 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:44,455 INFO L93 Difference]: Finished difference Result 537 states and 1234 transitions. [2021-06-05 22:22:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:22:44,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:44,456 INFO L225 Difference]: With dead ends: 537 [2021-06-05 22:22:44,456 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 22:22:44,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1086.3ms TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:22:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 22:22:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 336. [2021-06-05 22:22:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 22:22:44,460 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 22:22:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:44,460 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 22:22:44,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 22:22:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:44,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:44,460 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:44,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14756 [2021-06-05 22:22:44,661 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1770375397, now seen corresponding path program 481 times [2021-06-05 22:22:44,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:44,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32778364] [2021-06-05 22:22:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:44,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:44,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32778364] [2021-06-05 22:22:44,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32778364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:44,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559287904] [2021-06-05 22:22:44,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:44,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:44,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:44,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:44,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:44,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:44,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:44,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:44,913 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:44,913 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:44,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:44,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:44,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559287904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:44,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:44,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:44,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102836761] [2021-06-05 22:22:44,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:44,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:44,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:44,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:44,960 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:45,554 INFO L93 Difference]: Finished difference Result 569 states and 1330 transitions. [2021-06-05 22:22:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:22:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:45,555 INFO L225 Difference]: With dead ends: 569 [2021-06-05 22:22:45,555 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:22:45,555 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 535.6ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:22:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:22:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 336. [2021-06-05 22:22:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 22:22:45,559 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 22:22:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 22:22:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 22:22:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:45,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:45,560 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:45,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14775,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:45,760 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1323037674, now seen corresponding path program 482 times [2021-06-05 22:22:45,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:45,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604093410] [2021-06-05 22:22:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:45,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:45,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604093410] [2021-06-05 22:22:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604093410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:45,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841966870] [2021-06-05 22:22:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:45,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:45,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:46,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:46,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:46,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:46,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:46,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:46,056 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:22:46,056 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:46,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:46,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:46,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:22:46,074 INFO L518 ElimStorePlain]: Eliminatee v_prenex_533 vanished before elimination [2021-06-05 22:22:46,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:46,075 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:22:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:46,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841966870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:46,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:46,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048094843] [2021-06-05 22:22:46,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:46,130 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:46,706 INFO L93 Difference]: Finished difference Result 428 states and 1071 transitions. [2021-06-05 22:22:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:22:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:46,707 INFO L225 Difference]: With dead ends: 428 [2021-06-05 22:22:46,707 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 22:22:46,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:22:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 22:22:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 332. [2021-06-05 22:22:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.700906344410876) internal successors, (894), 331 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 894 transitions. [2021-06-05 22:22:46,711 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 894 transitions. Word has length 19 [2021-06-05 22:22:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:46,711 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 894 transitions. [2021-06-05 22:22:46,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:46,711 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 894 transitions. [2021-06-05 22:22:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:46,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:46,711 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:46,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14783,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:46,912 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash -659759571, now seen corresponding path program 483 times [2021-06-05 22:22:46,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:46,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714226278] [2021-06-05 22:22:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:46,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:46,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714226278] [2021-06-05 22:22:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714226278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:46,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626544873] [2021-06-05 22:22:46,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:47,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:22:47,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:47,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:47,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:47,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:47,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:47,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:47,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:47,165 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:22:47,165 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:47,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:47,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:22:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:47,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626544873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:47,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:47,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:47,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776315323] [2021-06-05 22:22:47,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:47,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:47,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:47,235 INFO L87 Difference]: Start difference. First operand 332 states and 894 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:48,100 INFO L93 Difference]: Finished difference Result 524 states and 1244 transitions. [2021-06-05 22:22:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:22:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:48,101 INFO L225 Difference]: With dead ends: 524 [2021-06-05 22:22:48,101 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 22:22:48,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 766.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:22:48,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 22:22:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 329. [2021-06-05 22:22:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.701219512195122) internal successors, (886), 328 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 886 transitions. [2021-06-05 22:22:48,105 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 886 transitions. Word has length 19 [2021-06-05 22:22:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:48,105 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 886 transitions. [2021-06-05 22:22:48,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 886 transitions. [2021-06-05 22:22:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:48,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:48,106 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:48,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14800,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:48,306 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:48,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1683691312, now seen corresponding path program 484 times [2021-06-05 22:22:48,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:48,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119232855] [2021-06-05 22:22:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:48,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119232855] [2021-06-05 22:22:48,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119232855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:48,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260915052] [2021-06-05 22:22:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:48,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:48,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:48,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:48,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:48,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:48,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:48,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:48,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:48,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:48,529 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:48,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:48,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:48,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:48,569 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:22:48,570 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:48,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:48,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260915052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:48,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:48,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:48,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085366988] [2021-06-05 22:22:48,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:48,623 INFO L87 Difference]: Start difference. First operand 329 states and 886 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:50,151 INFO L93 Difference]: Finished difference Result 638 states and 1467 transitions. [2021-06-05 22:22:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:22:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:50,152 INFO L225 Difference]: With dead ends: 638 [2021-06-05 22:22:50,152 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 22:22:50,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1399.1ms TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:22:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 22:22:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 343. [2021-06-05 22:22:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7339181286549707) internal successors, (935), 342 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 935 transitions. [2021-06-05 22:22:50,156 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 935 transitions. Word has length 19 [2021-06-05 22:22:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:50,156 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 935 transitions. [2021-06-05 22:22:50,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 935 transitions. [2021-06-05 22:22:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:50,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:50,156 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:50,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14811 [2021-06-05 22:22:50,357 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1936846577, now seen corresponding path program 485 times [2021-06-05 22:22:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:50,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431760375] [2021-06-05 22:22:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:50,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431760375] [2021-06-05 22:22:50,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431760375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:50,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515836524] [2021-06-05 22:22:50,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:50,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:50,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:50,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:50,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:50,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:50,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:50,628 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:22:50,628 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:50,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:50,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:22:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515836524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:50,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:50,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:50,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638615321] [2021-06-05 22:22:50,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:50,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:50,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:50,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:50,675 INFO L87 Difference]: Start difference. First operand 343 states and 935 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:51,289 INFO L93 Difference]: Finished difference Result 481 states and 1167 transitions. [2021-06-05 22:22:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:22:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:51,290 INFO L225 Difference]: With dead ends: 481 [2021-06-05 22:22:51,290 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:22:51,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:22:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:22:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 340. [2021-06-05 22:22:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.7227138643067845) internal successors, (923), 339 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 923 transitions. [2021-06-05 22:22:51,294 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 923 transitions. Word has length 19 [2021-06-05 22:22:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:51,294 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 923 transitions. [2021-06-05 22:22:51,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 923 transitions. [2021-06-05 22:22:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:51,294 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:51,294 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:51,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14823,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:51,495 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1910782996, now seen corresponding path program 486 times [2021-06-05 22:22:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:51,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714877917] [2021-06-05 22:22:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714877917] [2021-06-05 22:22:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714877917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625007125] [2021-06-05 22:22:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:51,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:51,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:51,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:51,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:51,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:51,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:51,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:51,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:51,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:51,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:51,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:51,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:51,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:51,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:51,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:51,747 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:22:51,747 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:51,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:51,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625007125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:51,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:51,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738418904] [2021-06-05 22:22:51,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:51,792 INFO L87 Difference]: Start difference. First operand 340 states and 923 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:52,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:52,582 INFO L93 Difference]: Finished difference Result 546 states and 1309 transitions. [2021-06-05 22:22:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:22:52,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:52,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:52,582 INFO L225 Difference]: With dead ends: 546 [2021-06-05 22:22:52,582 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 22:22:52,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:22:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 22:22:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2021-06-05 22:22:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.687878787878788) internal successors, (887), 330 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 887 transitions. [2021-06-05 22:22:52,586 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 887 transitions. Word has length 19 [2021-06-05 22:22:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:52,586 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 887 transitions. [2021-06-05 22:22:52,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 887 transitions. [2021-06-05 22:22:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:52,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:52,587 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:52,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14833 [2021-06-05 22:22:52,787 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:52,787 INFO L82 PathProgramCache]: Analyzing trace with hash -72014249, now seen corresponding path program 487 times [2021-06-05 22:22:52,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:52,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016494804] [2021-06-05 22:22:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:52,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016494804] [2021-06-05 22:22:52,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016494804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518127837] [2021-06-05 22:22:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:52,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:52,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:53,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:53,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:53,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:53,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:53,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:53,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:53,063 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:22:53,063 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:53,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:53,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:22:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:53,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518127837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:53,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:53,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:53,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720825432] [2021-06-05 22:22:53,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:53,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:53,132 INFO L87 Difference]: Start difference. First operand 331 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:53,914 INFO L93 Difference]: Finished difference Result 437 states and 1068 transitions. [2021-06-05 22:22:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:22:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:53,914 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:22:53,914 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 22:22:53,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 763.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:22:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 22:22:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 328. [2021-06-05 22:22:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.685015290519878) internal successors, (878), 327 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:53,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 878 transitions. [2021-06-05 22:22:53,918 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 878 transitions. Word has length 19 [2021-06-05 22:22:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:53,918 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 878 transitions. [2021-06-05 22:22:53,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:53,918 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 878 transitions. [2021-06-05 22:22:53,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:53,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:53,918 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:54,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14842,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:54,119 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1375553194, now seen corresponding path program 488 times [2021-06-05 22:22:54,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:54,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424022167] [2021-06-05 22:22:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:54,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424022167] [2021-06-05 22:22:54,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424022167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350113604] [2021-06-05 22:22:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:54,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:22:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:54,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:54,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:54,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:54,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:54,357 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:22:54,357 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:54,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:22:54,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:22:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350113604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:54,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:54,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589820707] [2021-06-05 22:22:54,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:54,381 INFO L87 Difference]: Start difference. First operand 328 states and 878 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:54,762 INFO L93 Difference]: Finished difference Result 446 states and 1101 transitions. [2021-06-05 22:22:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:22:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:54,763 INFO L225 Difference]: With dead ends: 446 [2021-06-05 22:22:54,763 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 22:22:54,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 22:22:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 22:22:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.664576802507837) internal successors, (850), 319 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:54,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 850 transitions. [2021-06-05 22:22:54,766 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 850 transitions. Word has length 19 [2021-06-05 22:22:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:54,766 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 850 transitions. [2021-06-05 22:22:54,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 850 transitions. [2021-06-05 22:22:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:54,766 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:54,767 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:54,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14861,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:54,967 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1003696907, now seen corresponding path program 489 times [2021-06-05 22:22:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:54,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818419937] [2021-06-05 22:22:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:22:55,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818419937] [2021-06-05 22:22:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818419937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506113735] [2021-06-05 22:22:55,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:55,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:22:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:55,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:55,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:22:55,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:55,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:55,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:55,260 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:22:55,261 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:55,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:22:55,261 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:22:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506113735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:22:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004802229] [2021-06-05 22:22:55,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:22:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:22:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:22:55,291 INFO L87 Difference]: Start difference. First operand 320 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:55,668 INFO L93 Difference]: Finished difference Result 350 states and 905 transitions. [2021-06-05 22:22:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:22:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:55,669 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:22:55,669 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 22:22:55,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 402.6ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:22:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 22:22:55,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2021-06-05 22:22:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6634920634920634) internal successors, (839), 315 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 839 transitions. [2021-06-05 22:22:55,672 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 839 transitions. Word has length 19 [2021-06-05 22:22:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:55,672 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 839 transitions. [2021-06-05 22:22:55,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 839 transitions. [2021-06-05 22:22:55,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:55,673 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:55,673 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:55,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14865 [2021-06-05 22:22:55,873 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash -643455514, now seen corresponding path program 490 times [2021-06-05 22:22:55,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:55,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187694950] [2021-06-05 22:22:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:55,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:55,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187694950] [2021-06-05 22:22:55,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187694950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:55,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983750803] [2021-06-05 22:22:55,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:55,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:22:55,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:56,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:56,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:56,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:56,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:56,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:56,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:56,108 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:56,147 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:22:56,147 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:56,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:56,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:56,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983750803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:56,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:56,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:56,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950934] [2021-06-05 22:22:56,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:56,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:56,203 INFO L87 Difference]: Start difference. First operand 316 states and 839 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:57,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:57,431 INFO L93 Difference]: Finished difference Result 496 states and 1216 transitions. [2021-06-05 22:22:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:22:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:57,432 INFO L225 Difference]: With dead ends: 496 [2021-06-05 22:22:57,432 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 22:22:57,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1136.7ms TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:22:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 22:22:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 334. [2021-06-05 22:22:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 22:22:57,436 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 22:22:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:57,436 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 22:22:57,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 22:22:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:57,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:57,436 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:57,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14878 [2021-06-05 22:22:57,637 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash -896610779, now seen corresponding path program 491 times [2021-06-05 22:22:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:57,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332265877] [2021-06-05 22:22:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:57,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:57,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332265877] [2021-06-05 22:22:57,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332265877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:57,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344552683] [2021-06-05 22:22:57,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:57,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:22:57,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:57,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:57,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:57,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:57,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:57,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:57,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:57,932 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:22:57,932 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:57,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:57,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:22:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:57,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344552683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:57,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:57,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497497934] [2021-06-05 22:22:57,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:57,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:57,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:57,981 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:58,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:58,497 INFO L93 Difference]: Finished difference Result 430 states and 1080 transitions. [2021-06-05 22:22:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:22:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:58,498 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:22:58,498 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 22:22:58,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:22:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 22:22:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 334. [2021-06-05 22:22:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 22:22:58,503 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 22:22:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:58,503 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 22:22:58,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 22:22:58,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:58,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:58,504 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:22:58,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14890 [2021-06-05 22:22:58,704 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:22:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:22:58,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1343948502, now seen corresponding path program 492 times [2021-06-05 22:22:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:22:58,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031698102] [2021-06-05 22:22:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:22:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:22:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:58,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:22:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031698102] [2021-06-05 22:22:58,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031698102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526308650] [2021-06-05 22:22:58,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:22:58,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:22:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:22:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:22:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:22:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:58,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:58,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:22:58,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:58,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:22:58,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:58,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:22:58,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:58,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:22:58,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:22:58,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:22:58,977 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:22:58,978 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:22:58,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:22:58,979 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:22:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:22:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526308650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:22:59,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:22:59,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:22:59,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145673827] [2021-06-05 22:22:59,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:22:59,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:22:59,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:22:59,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:22:59,025 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:22:59,952 INFO L93 Difference]: Finished difference Result 529 states and 1272 transitions. [2021-06-05 22:22:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:22:59,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:22:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:22:59,953 INFO L225 Difference]: With dead ends: 529 [2021-06-05 22:22:59,953 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:22:59,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:22:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:22:59,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 332. [2021-06-05 22:22:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.691842900302115) internal successors, (891), 331 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 891 transitions. [2021-06-05 22:22:59,957 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 891 transitions. Word has length 19 [2021-06-05 22:22:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:22:59,957 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 891 transitions. [2021-06-05 22:22:59,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:22:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 891 transitions. [2021-06-05 22:22:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:22:59,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:22:59,958 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:00,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14906,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:00,158 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 968221549, now seen corresponding path program 493 times [2021-06-05 22:23:00,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:00,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323597] [2021-06-05 22:23:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:00,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323597] [2021-06-05 22:23:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282685538] [2021-06-05 22:23:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:00,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:00,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:00,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:00,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:00,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:00,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:00,448 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:00,449 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:00,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:00,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:00,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282685538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:00,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:00,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:23:00,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430508840] [2021-06-05 22:23:00,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:00,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:00,520 INFO L87 Difference]: Start difference. First operand 332 states and 891 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:01,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:01,213 INFO L93 Difference]: Finished difference Result 424 states and 1058 transitions. [2021-06-05 22:23:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:23:01,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:01,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:01,214 INFO L225 Difference]: With dead ends: 424 [2021-06-05 22:23:01,214 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:23:01,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 672.0ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:23:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:23:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-06-05 22:23:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.689969604863222) internal successors, (885), 329 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 885 transitions. [2021-06-05 22:23:01,218 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 885 transitions. Word has length 19 [2021-06-05 22:23:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:01,218 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 885 transitions. [2021-06-05 22:23:01,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 885 transitions. [2021-06-05 22:23:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:01,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:01,218 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:01,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14916 [2021-06-05 22:23:01,419 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1879178304, now seen corresponding path program 494 times [2021-06-05 22:23:01,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:01,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424289027] [2021-06-05 22:23:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:01,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:01,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424289027] [2021-06-05 22:23:01,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424289027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:01,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909123196] [2021-06-05 22:23:01,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:01,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:01,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:01,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:01,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:01,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:01,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:01,682 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:01,682 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:01,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:01,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:01,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909123196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:01,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:01,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:23:01,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421388473] [2021-06-05 22:23:01,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:01,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:01,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:01,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:01,707 INFO L87 Difference]: Start difference. First operand 330 states and 885 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:02,229 INFO L93 Difference]: Finished difference Result 447 states and 1108 transitions. [2021-06-05 22:23:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:02,229 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:23:02,229 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:23:02,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:23:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:23:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-06-05 22:23:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.68) internal successors, (871), 325 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 871 transitions. [2021-06-05 22:23:02,233 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 871 transitions. Word has length 19 [2021-06-05 22:23:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:02,233 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 871 transitions. [2021-06-05 22:23:02,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 871 transitions. [2021-06-05 22:23:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:02,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:02,233 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:02,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14929,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:02,434 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2043932705, now seen corresponding path program 495 times [2021-06-05 22:23:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:02,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139549865] [2021-06-05 22:23:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:02,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139549865] [2021-06-05 22:23:02,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139549865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:02,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544935684] [2021-06-05 22:23:02,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:23:02,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:02,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:02,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:02,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:02,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:02,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:02,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:02,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:02,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:02,749 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:02,750 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:02,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:02,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:02,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544935684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:02,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:02,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:23:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385197294] [2021-06-05 22:23:02,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:02,781 INFO L87 Difference]: Start difference. First operand 326 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:03,178 INFO L93 Difference]: Finished difference Result 366 states and 944 transitions. [2021-06-05 22:23:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:03,178 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:03,179 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:23:03,179 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 22:23:03,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:23:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 22:23:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 324. [2021-06-05 22:23:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 22:23:03,182 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 19 [2021-06-05 22:23:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:03,182 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 22:23:03,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 22:23:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:03,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:03,182 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:03,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14933 [2021-06-05 22:23:03,383 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:03,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:03,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1291432982, now seen corresponding path program 496 times [2021-06-05 22:23:03,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:03,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7880399] [2021-06-05 22:23:03,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:03,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7880399] [2021-06-05 22:23:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7880399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:03,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030821605] [2021-06-05 22:23:03,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:03,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:03,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:03,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:03,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:03,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:03,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:03,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:03,641 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:03,641 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:03,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:03,642 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:03,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030821605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:03,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:03,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:23:03,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894592712] [2021-06-05 22:23:03,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:03,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:03,667 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:03,998 INFO L93 Difference]: Finished difference Result 405 states and 1018 transitions. [2021-06-05 22:23:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:03,999 INFO L225 Difference]: With dead ends: 405 [2021-06-05 22:23:03,999 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 22:23:03,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 22:23:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 320. [2021-06-05 22:23:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6677115987460813) internal successors, (851), 319 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 851 transitions. [2021-06-05 22:23:04,002 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 851 transitions. Word has length 19 [2021-06-05 22:23:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:04,002 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 851 transitions. [2021-06-05 22:23:04,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 851 transitions. [2021-06-05 22:23:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:04,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:04,002 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:04,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14946 [2021-06-05 22:23:04,203 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1031240173, now seen corresponding path program 497 times [2021-06-05 22:23:04,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:04,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373328862] [2021-06-05 22:23:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373328862] [2021-06-05 22:23:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373328862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47212583] [2021-06-05 22:23:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:04,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:04,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:04,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:04,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:04,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:04,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:04,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:04,523 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:04,523 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:04,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:04,524 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:04,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47212583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:04,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:04,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:23:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654618907] [2021-06-05 22:23:04,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:04,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:04,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:04,555 INFO L87 Difference]: Start difference. First operand 320 states and 851 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:04,833 INFO L93 Difference]: Finished difference Result 359 states and 921 transitions. [2021-06-05 22:23:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:23:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:04,834 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:23:04,834 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:23:04,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:23:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-06-05 22:23:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6614420062695925) internal successors, (849), 319 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 849 transitions. [2021-06-05 22:23:04,837 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 849 transitions. Word has length 19 [2021-06-05 22:23:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:04,837 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 849 transitions. [2021-06-05 22:23:04,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 849 transitions. [2021-06-05 22:23:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:04,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:04,838 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:05,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14950 [2021-06-05 22:23:05,038 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:05,039 INFO L82 PathProgramCache]: Analyzing trace with hash -81901800, now seen corresponding path program 498 times [2021-06-05 22:23:05,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:05,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999355605] [2021-06-05 22:23:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:05,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:05,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999355605] [2021-06-05 22:23:05,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999355605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:05,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688452232] [2021-06-05 22:23:05,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:05,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:23:05,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:05,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:05,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:05,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:05,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:05,543 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:05,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:05,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:05,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:05,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-06-05 22:23:05,560 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:05,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:05,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:05,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688452232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:05,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:05,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:05,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124325682] [2021-06-05 22:23:05,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:05,592 INFO L87 Difference]: Start difference. First operand 320 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:06,109 INFO L93 Difference]: Finished difference Result 460 states and 1081 transitions. [2021-06-05 22:23:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:23:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:06,109 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:23:06,109 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 22:23:06,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:23:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 22:23:06,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 342. [2021-06-05 22:23:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.6422287390029324) internal successors, (901), 341 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 901 transitions. [2021-06-05 22:23:06,113 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 901 transitions. Word has length 19 [2021-06-05 22:23:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:06,113 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 901 transitions. [2021-06-05 22:23:06,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,113 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 901 transitions. [2021-06-05 22:23:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:06,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:06,114 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:06,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14963 [2021-06-05 22:23:06,314 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 132170361, now seen corresponding path program 499 times [2021-06-05 22:23:06,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:06,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220682279] [2021-06-05 22:23:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:06,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:06,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220682279] [2021-06-05 22:23:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220682279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:06,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848306221] [2021-06-05 22:23:06,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:06,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:06,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:06,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:06,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:06,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:06,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:06,631 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:06,631 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:06,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:06,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:06,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848306221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:06,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:06,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:06,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405793477] [2021-06-05 22:23:06,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:06,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:06,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:06,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:06,656 INFO L87 Difference]: Start difference. First operand 342 states and 901 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:06,937 INFO L93 Difference]: Finished difference Result 508 states and 1198 transitions. [2021-06-05 22:23:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:06,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:06,938 INFO L225 Difference]: With dead ends: 508 [2021-06-05 22:23:06,938 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 22:23:06,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 22:23:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-06-05 22:23:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.657142857142857) internal successors, (930), 350 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 930 transitions. [2021-06-05 22:23:06,942 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 930 transitions. Word has length 19 [2021-06-05 22:23:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:06,942 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 930 transitions. [2021-06-05 22:23:06,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 930 transitions. [2021-06-05 22:23:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:06,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:06,943 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:07,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14990,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:07,145 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash 777583956, now seen corresponding path program 500 times [2021-06-05 22:23:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:07,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528788243] [2021-06-05 22:23:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:07,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528788243] [2021-06-05 22:23:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528788243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743108437] [2021-06-05 22:23:07,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:07,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:07,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:07,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:07,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:07,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:07,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:07,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:07,645 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:07,645 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:07,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:07,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:07,662 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-06-05 22:23:07,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:07,663 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:07,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743108437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:07,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:07,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:07,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138332828] [2021-06-05 22:23:07,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:07,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:07,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:07,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:07,694 INFO L87 Difference]: Start difference. First operand 351 states and 930 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:08,406 INFO L93 Difference]: Finished difference Result 503 states and 1168 transitions. [2021-06-05 22:23:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:23:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:08,407 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:23:08,407 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:23:08,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 688.5ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:23:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:23:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2021-06-05 22:23:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.65625) internal successors, (935), 352 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 935 transitions. [2021-06-05 22:23:08,411 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 935 transitions. Word has length 19 [2021-06-05 22:23:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:08,411 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 935 transitions. [2021-06-05 22:23:08,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 935 transitions. [2021-06-05 22:23:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:08,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:08,411 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:08,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14994 [2021-06-05 22:23:08,612 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:08,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:08,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1986457133, now seen corresponding path program 501 times [2021-06-05 22:23:08,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:08,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849117152] [2021-06-05 22:23:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:08,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:08,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849117152] [2021-06-05 22:23:08,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849117152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:08,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598159404] [2021-06-05 22:23:08,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:08,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:23:08,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:08,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:08,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:08,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:08,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:08,938 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:08,938 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:08,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:08,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:08,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598159404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:08,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:08,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:08,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913452797] [2021-06-05 22:23:08,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:08,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:08,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:08,963 INFO L87 Difference]: Start difference. First operand 353 states and 935 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:09,511 INFO L93 Difference]: Finished difference Result 565 states and 1323 transitions. [2021-06-05 22:23:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:09,512 INFO L225 Difference]: With dead ends: 565 [2021-06-05 22:23:09,512 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 22:23:09,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:23:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 22:23:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 344. [2021-06-05 22:23:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6588921282798834) internal successors, (912), 343 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 912 transitions. [2021-06-05 22:23:09,516 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 912 transitions. Word has length 19 [2021-06-05 22:23:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:09,516 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 912 transitions. [2021-06-05 22:23:09,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:09,516 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 912 transitions. [2021-06-05 22:23:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:09,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:09,517 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:09,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15020 [2021-06-05 22:23:09,717 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1913687960, now seen corresponding path program 502 times [2021-06-05 22:23:09,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:09,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054931652] [2021-06-05 22:23:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:09,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054931652] [2021-06-05 22:23:09,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054931652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:09,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782782023] [2021-06-05 22:23:09,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:09,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:09,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:10,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:10,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:10,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:10,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,205 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:10,205 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:10,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:10,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:10,222 INFO L518 ElimStorePlain]: Eliminatee v_prenex_551 vanished before elimination [2021-06-05 22:23:10,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:10,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:10,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782782023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:10,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:10,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040112757] [2021-06-05 22:23:10,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:10,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:10,254 INFO L87 Difference]: Start difference. First operand 344 states and 912 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:10,963 INFO L93 Difference]: Finished difference Result 465 states and 1094 transitions. [2021-06-05 22:23:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:23:10,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:10,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:10,963 INFO L225 Difference]: With dead ends: 465 [2021-06-05 22:23:10,963 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:23:10,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:23:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:23:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 344. [2021-06-05 22:23:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6501457725947524) internal successors, (909), 343 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 909 transitions. [2021-06-05 22:23:10,967 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 909 transitions. Word has length 19 [2021-06-05 22:23:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:10,967 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 909 transitions. [2021-06-05 22:23:10,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:10,967 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 909 transitions. [2021-06-05 22:23:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:10,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:10,968 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:11,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15024,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:11,168 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:11,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1639157959, now seen corresponding path program 503 times [2021-06-05 22:23:11,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:11,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586734705] [2021-06-05 22:23:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:11,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:11,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586734705] [2021-06-05 22:23:11,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586734705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:11,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384486476] [2021-06-05 22:23:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:11,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:11,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:11,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:11,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:11,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:11,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:11,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:11,505 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:11,505 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:11,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:11,506 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:11,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384486476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:11,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:11,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:11,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774480629] [2021-06-05 22:23:11,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:11,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:11,530 INFO L87 Difference]: Start difference. First operand 344 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:12,595 INFO L93 Difference]: Finished difference Result 515 states and 1189 transitions. [2021-06-05 22:23:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:12,596 INFO L225 Difference]: With dead ends: 515 [2021-06-05 22:23:12,596 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 22:23:12,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:23:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 22:23:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 315. [2021-06-05 22:23:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.6178343949044587) internal successors, (822), 314 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 822 transitions. [2021-06-05 22:23:12,600 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 822 transitions. Word has length 19 [2021-06-05 22:23:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:12,600 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 822 transitions. [2021-06-05 22:23:12,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 822 transitions. [2021-06-05 22:23:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:12,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:12,600 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:12,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15040 [2021-06-05 22:23:12,801 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:12,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1673241812, now seen corresponding path program 504 times [2021-06-05 22:23:12,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:12,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186841146] [2021-06-05 22:23:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:12,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:12,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186841146] [2021-06-05 22:23:12,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186841146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:12,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790890036] [2021-06-05 22:23:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:12,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:23:12,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:13,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:13,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:13,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:13,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:13,165 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:23:13,165 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:13,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:13,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:13,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:13,183 INFO L518 ElimStorePlain]: Eliminatee v_prenex_554 vanished before elimination [2021-06-05 22:23:13,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:13,184 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:13,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790890036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:13,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:13,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315625377] [2021-06-05 22:23:13,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:13,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:13,251 INFO L87 Difference]: Start difference. First operand 315 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:14,203 INFO L93 Difference]: Finished difference Result 485 states and 1081 transitions. [2021-06-05 22:23:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:23:14,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:14,204 INFO L225 Difference]: With dead ends: 485 [2021-06-05 22:23:14,204 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:23:14,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 898.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:23:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:23:14,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 320. [2021-06-05 22:23:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.633228840125392) internal successors, (840), 319 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 840 transitions. [2021-06-05 22:23:14,208 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 840 transitions. Word has length 19 [2021-06-05 22:23:14,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:14,208 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 840 transitions. [2021-06-05 22:23:14,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 840 transitions. [2021-06-05 22:23:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:14,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:14,208 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:14,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15044,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:14,409 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:14,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1420086547, now seen corresponding path program 505 times [2021-06-05 22:23:14,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:14,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574955994] [2021-06-05 22:23:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574955994] [2021-06-05 22:23:14,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574955994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:14,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323592201] [2021-06-05 22:23:14,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:14,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:14,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:14,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:14,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:14,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:14,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:14,744 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:14,744 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:14,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:14,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:14,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323592201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:14,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:14,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242779675] [2021-06-05 22:23:14,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:14,795 INFO L87 Difference]: Start difference. First operand 320 states and 840 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:15,882 INFO L93 Difference]: Finished difference Result 488 states and 1101 transitions. [2021-06-05 22:23:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:23:15,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:15,883 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:23:15,883 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 22:23:15,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1076.7ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:23:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 22:23:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 313. [2021-06-05 22:23:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.6153846153846154) internal successors, (816), 312 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:15,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 816 transitions. [2021-06-05 22:23:15,886 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 816 transitions. Word has length 19 [2021-06-05 22:23:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:15,886 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 816 transitions. [2021-06-05 22:23:15,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 816 transitions. [2021-06-05 22:23:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:15,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:15,887 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:16,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15057,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:16,087 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash 972748824, now seen corresponding path program 506 times [2021-06-05 22:23:16,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:16,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467232177] [2021-06-05 22:23:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:16,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:16,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467232177] [2021-06-05 22:23:16,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467232177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:16,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757321411] [2021-06-05 22:23:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:16,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:16,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:16,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:16,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:16,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:16,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:16,459 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:23:16,459 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:16,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:16,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:16,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:16,477 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-05 22:23:16,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:16,478 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:16,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757321411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:16,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:16,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:16,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485166801] [2021-06-05 22:23:16,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:16,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:16,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:16,538 INFO L87 Difference]: Start difference. First operand 313 states and 816 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:16,935 INFO L93 Difference]: Finished difference Result 403 states and 946 transitions. [2021-06-05 22:23:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:16,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:16,936 INFO L225 Difference]: With dead ends: 403 [2021-06-05 22:23:16,936 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:23:16,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:23:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:23:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 310. [2021-06-05 22:23:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.6019417475728157) internal successors, (804), 309 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 804 transitions. [2021-06-05 22:23:16,939 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 804 transitions. Word has length 19 [2021-06-05 22:23:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:16,939 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 804 transitions. [2021-06-05 22:23:16,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 804 transitions. [2021-06-05 22:23:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:16,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:16,939 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:17,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15065 [2021-06-05 22:23:17,140 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:17,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1010048421, now seen corresponding path program 507 times [2021-06-05 22:23:17,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:17,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768603695] [2021-06-05 22:23:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:17,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:17,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768603695] [2021-06-05 22:23:17,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768603695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:17,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529390831] [2021-06-05 22:23:17,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:17,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:23:17,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:17,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:17,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:17,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:17,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:17,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:17,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:17,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:17,466 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:17,466 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:17,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:17,467 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:17,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529390831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:17,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:17,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:17,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505758989] [2021-06-05 22:23:17,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:17,545 INFO L87 Difference]: Start difference. First operand 310 states and 804 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:18,706 INFO L93 Difference]: Finished difference Result 381 states and 919 transitions. [2021-06-05 22:23:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:18,706 INFO L225 Difference]: With dead ends: 381 [2021-06-05 22:23:18,706 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 22:23:18,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1192.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:23:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 22:23:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2021-06-05 22:23:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 22:23:18,710 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 22:23:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:18,710 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 22:23:18,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 22:23:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:18,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:18,710 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:18,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15076,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:18,911 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:18,911 INFO L82 PathProgramCache]: Analyzing trace with hash -920005186, now seen corresponding path program 508 times [2021-06-05 22:23:18,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:18,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177367148] [2021-06-05 22:23:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:18,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:18,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177367148] [2021-06-05 22:23:18,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177367148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:18,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709570522] [2021-06-05 22:23:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:19,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:19,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:19,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:19,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:19,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:19,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:19,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:19,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:19,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:19,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:19,344 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:19,345 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:19,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:19,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:19,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-05 22:23:19,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:19,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:19,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709570522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:19,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:19,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:19,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698302630] [2021-06-05 22:23:19,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:19,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:19,421 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:19,673 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 22:23:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:19,674 INFO L225 Difference]: With dead ends: 331 [2021-06-05 22:23:19,674 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 22:23:19,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 22:23:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 304. [2021-06-05 22:23:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 22:23:19,677 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 22:23:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:19,677 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 22:23:19,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 22:23:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:19,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:19,678 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:19,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15087 [2021-06-05 22:23:19,878 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:19,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash 610921021, now seen corresponding path program 509 times [2021-06-05 22:23:19,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:19,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414854053] [2021-06-05 22:23:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:19,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:19,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414854053] [2021-06-05 22:23:19,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414854053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:19,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887241976] [2021-06-05 22:23:19,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:19,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:19,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:20,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:20,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:20,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:20,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:20,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:20,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:20,167 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:20,167 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:20,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:20,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:20,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887241976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:20,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:20,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:20,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897544120] [2021-06-05 22:23:20,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:20,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:20,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:20,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:20,196 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:20,409 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2021-06-05 22:23:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:20,410 INFO L225 Difference]: With dead ends: 355 [2021-06-05 22:23:20,410 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 22:23:20,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:23:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 22:23:20,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 304. [2021-06-05 22:23:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 22:23:20,413 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 22:23:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:20,413 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 22:23:20,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 22:23:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:20,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:20,413 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:20,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15104 [2021-06-05 22:23:20,614 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash 216098818, now seen corresponding path program 510 times [2021-06-05 22:23:20,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:20,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873663000] [2021-06-05 22:23:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:20,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:20,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873663000] [2021-06-05 22:23:20,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873663000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:20,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997276615] [2021-06-05 22:23:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:20,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:23:20,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:20,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:20,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:20,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:20,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:20,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:20,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:21,029 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:21,029 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:21,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:21,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:21,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:21,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-06-05 22:23:21,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:21,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:21,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997276615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:21,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:21,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:21,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970293426] [2021-06-05 22:23:21,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:21,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:21,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:21,076 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:21,401 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2021-06-05 22:23:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:21,402 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:23:21,402 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:23:21,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:23:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:23:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2021-06-05 22:23:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 22:23:21,405 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 22:23:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:21,405 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 22:23:21,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 22:23:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:21,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:21,405 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:21,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15108,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:21,606 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:21,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:21,606 INFO L82 PathProgramCache]: Analyzing trace with hash 958220195, now seen corresponding path program 511 times [2021-06-05 22:23:21,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:21,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208616568] [2021-06-05 22:23:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:21,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208616568] [2021-06-05 22:23:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208616568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:21,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73542465] [2021-06-05 22:23:21,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:21,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:21,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:21,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:21,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:21,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:21,911 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:21,911 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:21,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:21,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:21,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73542465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:21,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:21,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:21,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422238721] [2021-06-05 22:23:21,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:21,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:21,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:21,935 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:22,392 INFO L93 Difference]: Finished difference Result 409 states and 997 transitions. [2021-06-05 22:23:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:22,393 INFO L225 Difference]: With dead ends: 409 [2021-06-05 22:23:22,393 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:23:22,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 436.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:23:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:23:22,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2021-06-05 22:23:22,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 22:23:22,396 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 22:23:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:22,396 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 22:23:22,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 22:23:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:22,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:22,397 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:22,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15125,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:22,597 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash -24347330, now seen corresponding path program 512 times [2021-06-05 22:23:22,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:22,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264420820] [2021-06-05 22:23:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:22,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264420820] [2021-06-05 22:23:22,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264420820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:22,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949573742] [2021-06-05 22:23:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:22,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:22,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:22,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:22,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:22,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:22,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:22,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:22,936 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:23:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:22,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:22,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:22,955 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:22,955 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-06-05 22:23:22,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:22,956 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949573742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:23,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:23,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830217821] [2021-06-05 22:23:23,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:23,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:23,021 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:23,632 INFO L93 Difference]: Finished difference Result 370 states and 901 transitions. [2021-06-05 22:23:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:23,632 INFO L225 Difference]: With dead ends: 370 [2021-06-05 22:23:23,632 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 22:23:23,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:23:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 22:23:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 307. [2021-06-05 22:23:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 22:23:23,635 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 22:23:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:23,635 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 22:23:23,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 22:23:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:23,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:23,636 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:23,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15129,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:23,836 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -277502595, now seen corresponding path program 513 times [2021-06-05 22:23:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:23,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362220298] [2021-06-05 22:23:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:23,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362220298] [2021-06-05 22:23:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362220298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482915535] [2021-06-05 22:23:23,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:23,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:23:23,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:24,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:24,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:24,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:24,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:24,121 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:24,121 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:24,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:24,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:24,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482915535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:24,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:24,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:24,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140944157] [2021-06-05 22:23:24,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:24,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:24,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:24,170 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:24,789 INFO L93 Difference]: Finished difference Result 457 states and 1081 transitions. [2021-06-05 22:23:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:24,790 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:23:24,790 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:23:24,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 604.2ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:23:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:23:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-06-05 22:23:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 22:23:24,793 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 22:23:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:24,793 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 22:23:24,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 22:23:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:24,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:24,794 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15148 [2021-06-05 22:23:24,994 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:24,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash -724840318, now seen corresponding path program 514 times [2021-06-05 22:23:24,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:24,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047436626] [2021-06-05 22:23:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:25,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:25,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047436626] [2021-06-05 22:23:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047436626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504332901] [2021-06-05 22:23:25,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:25,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:25,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:25,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:25,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:25,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:25,331 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:23:25,331 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:25,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:25,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:25,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:25,349 INFO L518 ElimStorePlain]: Eliminatee v_prenex_573 vanished before elimination [2021-06-05 22:23:25,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:25,350 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:25,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504332901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:25,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:25,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:25,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16276201] [2021-06-05 22:23:25,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:25,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:25,407 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:25,760 INFO L93 Difference]: Finished difference Result 340 states and 859 transitions. [2021-06-05 22:23:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:23:25,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:25,761 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:23:25,761 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 22:23:25,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 22:23:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 306. [2021-06-05 22:23:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6) internal successors, (793), 305 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 793 transitions. [2021-06-05 22:23:25,764 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 793 transitions. Word has length 19 [2021-06-05 22:23:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:25,764 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 793 transitions. [2021-06-05 22:23:25,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 793 transitions. [2021-06-05 22:23:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:25,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:25,764 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:25,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15156,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:25,965 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:25,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1587329733, now seen corresponding path program 515 times [2021-06-05 22:23:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:25,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135235325] [2021-06-05 22:23:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:26,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135235325] [2021-06-05 22:23:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135235325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7879239] [2021-06-05 22:23:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:26,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:23:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:26,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:26,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:26,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:26,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:26,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:26,246 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:26,246 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:26,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:26,247 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:26,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7879239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:26,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:26,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249262616] [2021-06-05 22:23:26,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:26,317 INFO L87 Difference]: Start difference. First operand 306 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:27,124 INFO L93 Difference]: Finished difference Result 398 states and 971 transitions. [2021-06-05 22:23:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:27,124 INFO L225 Difference]: With dead ends: 398 [2021-06-05 22:23:27,124 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:23:27,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 796.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:23:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:23:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 303. [2021-06-05 22:23:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 22:23:27,127 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 22:23:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:27,127 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 22:23:27,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 22:23:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:27,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:27,128 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:27,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15173 [2021-06-05 22:23:27,329 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:27,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1916872104, now seen corresponding path program 516 times [2021-06-05 22:23:27,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:27,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370806501] [2021-06-05 22:23:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:27,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:27,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370806501] [2021-06-05 22:23:27,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370806501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:27,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67092187] [2021-06-05 22:23:27,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:27,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:23:27,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:27,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:27,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:27,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:27,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:27,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:27,710 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:23:27,710 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:27,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:27,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:27,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:27,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-06-05 22:23:27,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:27,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:23:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:27,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67092187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:27,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:27,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:27,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502608968] [2021-06-05 22:23:27,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:27,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:27,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:27,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:27,757 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:28,152 INFO L93 Difference]: Finished difference Result 379 states and 911 transitions. [2021-06-05 22:23:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:23:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:28,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:28,153 INFO L225 Difference]: With dead ends: 379 [2021-06-05 22:23:28,153 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 22:23:28,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 22:23:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 294. [2021-06-05 22:23:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.590443686006826) internal successors, (759), 293 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 759 transitions. [2021-06-05 22:23:28,156 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 759 transitions. Word has length 19 [2021-06-05 22:23:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:28,156 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 759 transitions. [2021-06-05 22:23:28,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 759 transitions. [2021-06-05 22:23:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:28,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:28,157 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:28,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15184,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:28,357 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1174750727, now seen corresponding path program 517 times [2021-06-05 22:23:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:28,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773298927] [2021-06-05 22:23:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:28,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:28,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773298927] [2021-06-05 22:23:28,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773298927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:28,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923282035] [2021-06-05 22:23:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:28,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:28,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:28,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:28,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:28,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:28,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:28,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:28,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:28,636 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:23:28,636 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:28,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:28,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:23:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:28,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923282035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:28,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:28,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147379044] [2021-06-05 22:23:28,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:28,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:28,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:28,659 INFO L87 Difference]: Start difference. First operand 294 states and 759 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:28,930 INFO L93 Difference]: Finished difference Result 426 states and 1007 transitions. [2021-06-05 22:23:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:23:28,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:28,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:28,931 INFO L225 Difference]: With dead ends: 426 [2021-06-05 22:23:28,931 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 22:23:28,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:28,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 22:23:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 305. [2021-06-05 22:23:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6052631578947367) internal successors, (792), 304 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 792 transitions. [2021-06-05 22:23:28,934 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 792 transitions. Word has length 19 [2021-06-05 22:23:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:28,935 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 792 transitions. [2021-06-05 22:23:28,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 792 transitions. [2021-06-05 22:23:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:28,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:28,935 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:29,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15201,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:29,136 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2137649044, now seen corresponding path program 518 times [2021-06-05 22:23:29,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:29,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481761885] [2021-06-05 22:23:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:29,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:29,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481761885] [2021-06-05 22:23:29,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481761885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:29,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584245091] [2021-06-05 22:23:29,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:29,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:29,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:29,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:29,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:29,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:29,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:29,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:29,437 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:23:29,437 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:29,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:29,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:29,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:29,456 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-06-05 22:23:29,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:29,457 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:29,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584245091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:29,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:29,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:29,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263711077] [2021-06-05 22:23:29,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:29,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:29,519 INFO L87 Difference]: Start difference. First operand 305 states and 792 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:30,068 INFO L93 Difference]: Finished difference Result 416 states and 972 transitions. [2021-06-05 22:23:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:23:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:30,069 INFO L225 Difference]: With dead ends: 416 [2021-06-05 22:23:30,069 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 22:23:30,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 22:23:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 307. [2021-06-05 22:23:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 22:23:30,072 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 22:23:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:30,072 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 22:23:30,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 22:23:30,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:30,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:30,073 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:30,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15205 [2021-06-05 22:23:30,273 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1884493779, now seen corresponding path program 519 times [2021-06-05 22:23:30,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:30,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587521412] [2021-06-05 22:23:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:30,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587521412] [2021-06-05 22:23:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587521412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629617299] [2021-06-05 22:23:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:30,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:23:30,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:30,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:30,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:30,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:30,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:30,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:30,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:30,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:30,524 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:30,524 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:30,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:30,525 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629617299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:30,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:30,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997604586] [2021-06-05 22:23:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:30,570 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:30,858 INFO L93 Difference]: Finished difference Result 475 states and 1100 transitions. [2021-06-05 22:23:30,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:30,859 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:23:30,859 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 22:23:30,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:23:30,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 22:23:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 307. [2021-06-05 22:23:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 22:23:30,862 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 22:23:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:30,862 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 22:23:30,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 22:23:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:30,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:30,862 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:31,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15224,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:31,063 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1437156056, now seen corresponding path program 520 times [2021-06-05 22:23:31,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:31,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123759062] [2021-06-05 22:23:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:31,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:31,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123759062] [2021-06-05 22:23:31,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123759062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:31,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398691330] [2021-06-05 22:23:31,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:31,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:31,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:31,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:31,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:31,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:31,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,364 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:23:31,364 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:31,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:31,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:31,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:23:31,382 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-06-05 22:23:31,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:31,383 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:23:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:31,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398691330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:31,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:31,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:31,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130857218] [2021-06-05 22:23:31,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:31,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:31,437 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:31,709 INFO L93 Difference]: Finished difference Result 386 states and 930 transitions. [2021-06-05 22:23:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:23:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:31,710 INFO L225 Difference]: With dead ends: 386 [2021-06-05 22:23:31,710 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 22:23:31,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 22:23:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 306. [2021-06-05 22:23:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6065573770491803) internal successors, (795), 305 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 795 transitions. [2021-06-05 22:23:31,713 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 795 transitions. Word has length 19 [2021-06-05 22:23:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:31,713 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 795 transitions. [2021-06-05 22:23:31,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 795 transitions. [2021-06-05 22:23:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:31,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:31,714 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:31,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15232,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:31,925 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -545641189, now seen corresponding path program 521 times [2021-06-05 22:23:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:31,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622560205] [2021-06-05 22:23:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:31,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622560205] [2021-06-05 22:23:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622560205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:31,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907203766] [2021-06-05 22:23:31,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:32,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:32,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:32,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:32,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:32,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:32,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:32,184 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:23:32,184 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:32,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:32,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:23:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:32,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907203766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:32,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:32,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:32,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634970761] [2021-06-05 22:23:32,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:32,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:32,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:32,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:32,253 INFO L87 Difference]: Start difference. First operand 306 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:32,745 INFO L93 Difference]: Finished difference Result 475 states and 1084 transitions. [2021-06-05 22:23:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:32,746 INFO L225 Difference]: With dead ends: 475 [2021-06-05 22:23:32,746 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:23:32,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:23:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 304. [2021-06-05 22:23:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.607260726072607) internal successors, (790), 303 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:32,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 790 transitions. [2021-06-05 22:23:32,750 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 790 transitions. Word has length 19 [2021-06-05 22:23:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:32,750 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 790 transitions. [2021-06-05 22:23:32,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 790 transitions. [2021-06-05 22:23:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:32,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:32,750 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:32,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15249 [2021-06-05 22:23:32,951 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1569572930, now seen corresponding path program 522 times [2021-06-05 22:23:32,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:32,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857821927] [2021-06-05 22:23:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857821927] [2021-06-05 22:23:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857821927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109275142] [2021-06-05 22:23:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:33,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:23:33,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:33,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:33,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:33,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:33,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:33,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:33,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:33,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:33,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:33,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:33,202 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:23:33,202 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:33,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:33,203 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:33,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109275142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:33,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:33,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156270242] [2021-06-05 22:23:33,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:33,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:33,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:33,255 INFO L87 Difference]: Start difference. First operand 304 states and 790 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:35,096 INFO L93 Difference]: Finished difference Result 692 states and 1463 transitions. [2021-06-05 22:23:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:23:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:35,097 INFO L225 Difference]: With dead ends: 692 [2021-06-05 22:23:35,097 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 22:23:35,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1649.1ms TimeCoverageRelationStatistics Valid=553, Invalid=4277, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:23:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 22:23:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 322. [2021-06-05 22:23:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 22:23:35,101 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 22:23:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:35,101 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 22:23:35,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 22:23:35,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:35,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:35,102 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:35,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15260 [2021-06-05 22:23:35,302 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:35,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:35,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1822728195, now seen corresponding path program 523 times [2021-06-05 22:23:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:35,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294045908] [2021-06-05 22:23:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:35,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:35,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294045908] [2021-06-05 22:23:35,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294045908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950032088] [2021-06-05 22:23:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:35,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:35,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:35,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:35,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:35,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:35,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:35,580 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:35,580 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:35,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:35,580 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950032088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:35,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:35,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526321383] [2021-06-05 22:23:35,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:35,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:35,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:35,626 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:36,002 INFO L93 Difference]: Finished difference Result 451 states and 1069 transitions. [2021-06-05 22:23:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:23:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:36,003 INFO L225 Difference]: With dead ends: 451 [2021-06-05 22:23:36,003 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 22:23:36,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:23:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 22:23:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-06-05 22:23:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 22:23:36,006 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 22:23:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:36,007 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 22:23:36,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 22:23:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:36,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:36,007 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:36,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15271,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:36,208 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2024901378, now seen corresponding path program 524 times [2021-06-05 22:23:36,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:36,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841947934] [2021-06-05 22:23:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841947934] [2021-06-05 22:23:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841947934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275276724] [2021-06-05 22:23:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:36,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:36,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:36,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:36,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:36,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:36,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:36,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:36,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:36,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:36,465 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:23:36,465 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:36,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:36,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:36,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275276724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:36,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:36,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:36,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219243409] [2021-06-05 22:23:36,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:36,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:36,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:36,510 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:37,371 INFO L93 Difference]: Finished difference Result 566 states and 1274 transitions. [2021-06-05 22:23:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:23:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:37,372 INFO L225 Difference]: With dead ends: 566 [2021-06-05 22:23:37,372 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 22:23:37,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:23:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 22:23:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 316. [2021-06-05 22:23:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6444444444444444) internal successors, (833), 315 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 833 transitions. [2021-06-05 22:23:37,376 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 833 transitions. Word has length 19 [2021-06-05 22:23:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:37,376 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 833 transitions. [2021-06-05 22:23:37,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 833 transitions. [2021-06-05 22:23:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:37,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:37,377 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:37,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15287,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:37,577 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:37,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash 42104133, now seen corresponding path program 525 times [2021-06-05 22:23:37,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:37,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212091523] [2021-06-05 22:23:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:37,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:37,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212091523] [2021-06-05 22:23:37,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212091523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:37,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874833767] [2021-06-05 22:23:37,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:37,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:23:37,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:37,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:37,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:37,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:37,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:37,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:37,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:38,022 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:38,023 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:38,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:38,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874833767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:38,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:38,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929951671] [2021-06-05 22:23:38,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:38,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:38,103 INFO L87 Difference]: Start difference. First operand 316 states and 833 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:38,800 INFO L93 Difference]: Finished difference Result 473 states and 1085 transitions. [2021-06-05 22:23:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:23:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:38,801 INFO L225 Difference]: With dead ends: 473 [2021-06-05 22:23:38,801 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 22:23:38,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 712.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:23:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 22:23:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 315. [2021-06-05 22:23:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.643312101910828) internal successors, (830), 314 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 830 transitions. [2021-06-05 22:23:38,805 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 830 transitions. Word has length 19 [2021-06-05 22:23:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:38,805 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 830 transitions. [2021-06-05 22:23:38,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 830 transitions. [2021-06-05 22:23:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:38,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:38,805 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:39,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15297,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:39,006 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1489671576, now seen corresponding path program 526 times [2021-06-05 22:23:39,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:39,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453872447] [2021-06-05 22:23:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:39,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453872447] [2021-06-05 22:23:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453872447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013473958] [2021-06-05 22:23:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:39,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:39,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:39,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:39,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:39,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:39,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:39,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:39,257 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:39,257 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:39,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:39,258 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:39,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013473958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:39,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:39,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:39,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314837535] [2021-06-05 22:23:39,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:39,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:39,281 INFO L87 Difference]: Start difference. First operand 315 states and 830 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:39,750 INFO L93 Difference]: Finished difference Result 476 states and 1112 transitions. [2021-06-05 22:23:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:23:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:39,750 INFO L225 Difference]: With dead ends: 476 [2021-06-05 22:23:39,751 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 22:23:39,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:23:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 22:23:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-06-05 22:23:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 22:23:39,754 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 22:23:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:39,754 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 22:23:39,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 22:23:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:39,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:39,755 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:39,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15316,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:39,956 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1117815289, now seen corresponding path program 527 times [2021-06-05 22:23:39,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:39,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306822298] [2021-06-05 22:23:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:40,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:40,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306822298] [2021-06-05 22:23:40,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306822298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:40,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599656034] [2021-06-05 22:23:40,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:40,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:23:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:40,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:40,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:40,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:40,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:40,250 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:40,250 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:40,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:40,251 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:40,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599656034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:40,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:40,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:23:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687607622] [2021-06-05 22:23:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:23:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:23:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:23:40,280 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:40,710 INFO L93 Difference]: Finished difference Result 381 states and 925 transitions. [2021-06-05 22:23:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:23:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:40,711 INFO L225 Difference]: With dead ends: 381 [2021-06-05 22:23:40,711 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 22:23:40,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:23:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 22:23:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 311. [2021-06-05 22:23:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 22:23:40,714 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 22:23:40,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:40,714 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 22:23:40,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 22:23:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:40,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:40,715 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:40,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:40,915 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -529337132, now seen corresponding path program 528 times [2021-06-05 22:23:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:40,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493545794] [2021-06-05 22:23:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:40,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:40,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493545794] [2021-06-05 22:23:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493545794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:40,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076079219] [2021-06-05 22:23:40,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:41,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:23:41,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:41,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:41,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:41,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:41,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:41,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:41,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:41,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:41,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:41,186 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:23:41,186 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:41,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:41,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076079219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:41,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:41,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:41,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910322654] [2021-06-05 22:23:41,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:41,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:41,241 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:43,596 INFO L93 Difference]: Finished difference Result 627 states and 1370 transitions. [2021-06-05 22:23:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:23:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:43,597 INFO L225 Difference]: With dead ends: 627 [2021-06-05 22:23:43,597 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 22:23:43,597 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2200.3ms TimeCoverageRelationStatistics Valid=634, Invalid=3656, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:23:43,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 22:23:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 22:23:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.653250773993808) internal successors, (857), 323 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 857 transitions. [2021-06-05 22:23:43,601 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 857 transitions. Word has length 19 [2021-06-05 22:23:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:43,601 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 857 transitions. [2021-06-05 22:23:43,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 857 transitions. [2021-06-05 22:23:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:43,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:43,601 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:43,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15333,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:43,802 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:43,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash -782492397, now seen corresponding path program 529 times [2021-06-05 22:23:43,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:43,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703620279] [2021-06-05 22:23:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:43,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703620279] [2021-06-05 22:23:43,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703620279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108368524] [2021-06-05 22:23:43,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:44,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:44,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:44,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:44,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:44,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:44,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:44,093 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:44,094 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:44,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:44,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108368524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:44,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:44,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997525895] [2021-06-05 22:23:44,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:44,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:44,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:44,142 INFO L87 Difference]: Start difference. First operand 324 states and 857 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:44,640 INFO L93 Difference]: Finished difference Result 431 states and 1027 transitions. [2021-06-05 22:23:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:23:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:44,641 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:23:44,641 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 22:23:44,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 22:23:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 323. [2021-06-05 22:23:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.6490683229813663) internal successors, (853), 322 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 853 transitions. [2021-06-05 22:23:44,644 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 853 transitions. Word has length 19 [2021-06-05 22:23:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:44,644 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 853 transitions. [2021-06-05 22:23:44,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:44,644 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 853 transitions. [2021-06-05 22:23:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:44,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:44,645 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:44,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15344,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:44,845 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:44,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:44,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1229830120, now seen corresponding path program 530 times [2021-06-05 22:23:44,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:44,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982984042] [2021-06-05 22:23:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:44,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982984042] [2021-06-05 22:23:44,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982984042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733738602] [2021-06-05 22:23:44,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:44,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:44,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:45,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:45,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:45,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:45,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:45,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:45,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:45,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:45,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:45,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:45,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:45,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:45,113 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:23:45,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:45,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:45,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:45,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733738602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:45,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:45,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:45,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521837749] [2021-06-05 22:23:45,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:45,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:45,161 INFO L87 Difference]: Start difference. First operand 323 states and 853 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:46,326 INFO L93 Difference]: Finished difference Result 553 states and 1248 transitions. [2021-06-05 22:23:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:23:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:46,327 INFO L225 Difference]: With dead ends: 553 [2021-06-05 22:23:46,327 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 22:23:46,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1122.8ms TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:23:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 22:23:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 312. [2021-06-05 22:23:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 22:23:46,331 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 22:23:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:46,331 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 22:23:46,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 22:23:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:46,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:46,331 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15360,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:46,532 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1082339931, now seen corresponding path program 531 times [2021-06-05 22:23:46,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:46,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962416282] [2021-06-05 22:23:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:46,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962416282] [2021-06-05 22:23:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962416282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461968233] [2021-06-05 22:23:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:46,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:23:46,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:46,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:46,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:46,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:46,827 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:46,827 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:46,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:46,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:46,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461968233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:46,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:46,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:46,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387118283] [2021-06-05 22:23:46,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:46,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:46,899 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:47,626 INFO L93 Difference]: Finished difference Result 397 states and 952 transitions. [2021-06-05 22:23:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:23:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:47,626 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:23:47,627 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 22:23:47,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:23:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 22:23:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 311. [2021-06-05 22:23:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 22:23:47,630 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 22:23:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:47,630 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 22:23:47,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 22:23:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:47,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:47,630 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:47,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15369 [2021-06-05 22:23:47,831 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1765059922, now seen corresponding path program 532 times [2021-06-05 22:23:47,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:47,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654104371] [2021-06-05 22:23:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:47,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654104371] [2021-06-05 22:23:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654104371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759253249] [2021-06-05 22:23:47,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:47,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:48,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:48,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:48,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:48,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:48,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:48,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:48,088 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:48,088 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:48,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:48,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:48,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759253249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:48,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:48,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:48,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437858099] [2021-06-05 22:23:48,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:48,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:48,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:48,113 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:49,149 INFO L93 Difference]: Finished difference Result 437 states and 1047 transitions. [2021-06-05 22:23:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:23:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:49,150 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:23:49,150 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 22:23:49,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1001.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:23:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 22:23:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 305. [2021-06-05 22:23:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.601973684210526) internal successors, (791), 304 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 791 transitions. [2021-06-05 22:23:49,153 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 791 transitions. Word has length 19 [2021-06-05 22:23:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:49,153 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 791 transitions. [2021-06-05 22:23:49,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 791 transitions. [2021-06-05 22:23:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:49,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:49,153 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:49,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15388,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:49,354 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:49,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:49,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2136916209, now seen corresponding path program 533 times [2021-06-05 22:23:49,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:49,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135835192] [2021-06-05 22:23:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:49,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135835192] [2021-06-05 22:23:49,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135835192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110682569] [2021-06-05 22:23:49,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:49,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:23:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:49,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:49,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:49,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:49,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:49,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:49,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:49,670 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:49,670 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:49,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:49,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:49,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110682569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:49,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:49,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:49,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617378609] [2021-06-05 22:23:49,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:49,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:49,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:49,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:49,701 INFO L87 Difference]: Start difference. First operand 305 states and 791 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:50,147 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 22:23:50,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:50,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:50,148 INFO L225 Difference]: With dead ends: 331 [2021-06-05 22:23:50,148 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:23:50,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:23:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:23:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 304. [2021-06-05 22:23:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 22:23:50,151 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 22:23:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 22:23:50,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 22:23:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:50,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:50,152 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:50,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15392,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:50,352 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:50,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1177314600, now seen corresponding path program 534 times [2021-06-05 22:23:50,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:50,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360999452] [2021-06-05 22:23:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:50,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:50,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:50,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360999452] [2021-06-05 22:23:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360999452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500223641] [2021-06-05 22:23:50,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:50,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:23:50,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:50,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:50,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:50,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:50,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:50,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:50,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,612 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:50,612 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:50,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:50,613 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:50,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500223641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:50,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:50,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:50,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90111985] [2021-06-05 22:23:50,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:50,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:50,641 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:50,985 INFO L93 Difference]: Finished difference Result 376 states and 920 transitions. [2021-06-05 22:23:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:50,986 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:23:50,986 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 22:23:50,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:23:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 22:23:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 22:23:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.585858585858586) internal successors, (768), 297 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 768 transitions. [2021-06-05 22:23:50,989 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 768 transitions. Word has length 19 [2021-06-05 22:23:50,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:50,989 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 768 transitions. [2021-06-05 22:23:50,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:50,989 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 768 transitions. [2021-06-05 22:23:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:50,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:50,990 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:51,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15405 [2021-06-05 22:23:51,190 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:51,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:51,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1145358555, now seen corresponding path program 535 times [2021-06-05 22:23:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:51,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967193570] [2021-06-05 22:23:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:23:51,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967193570] [2021-06-05 22:23:51,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967193570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:51,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599034074] [2021-06-05 22:23:51,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:51,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:51,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:51,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:51,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:51,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:51,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:51,502 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:51,502 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:51,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:51,503 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:51,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599034074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:51,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:51,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:23:51,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269874624] [2021-06-05 22:23:51,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:23:51,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:23:51,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:23:51,533 INFO L87 Difference]: Start difference. First operand 298 states and 768 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:51,891 INFO L93 Difference]: Finished difference Result 317 states and 796 transitions. [2021-06-05 22:23:51,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:23:51,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:51,892 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:23:51,892 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 22:23:51,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:23:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 22:23:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 297. [2021-06-05 22:23:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.5844594594594597) internal successors, (765), 296 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 765 transitions. [2021-06-05 22:23:51,894 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 765 transitions. Word has length 19 [2021-06-05 22:23:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:51,894 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 765 transitions. [2021-06-05 22:23:51,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 765 transitions. [2021-06-05 22:23:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:51,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:51,895 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:52,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15409,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:52,096 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201534, now seen corresponding path program 536 times [2021-06-05 22:23:52,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:52,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187107661] [2021-06-05 22:23:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:52,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187107661] [2021-06-05 22:23:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187107661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531581132] [2021-06-05 22:23:52,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:52,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:52,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:52,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:52,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:52,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:52,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:52,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:52,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:23:52,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:52,426 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:23:52,427 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:52,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:52,427 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531581132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:52,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:52,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598702620] [2021-06-05 22:23:52,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:52,484 INFO L87 Difference]: Start difference. First operand 297 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:53,438 INFO L93 Difference]: Finished difference Result 376 states and 903 transitions. [2021-06-05 22:23:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:53,438 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:23:53,439 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 22:23:53,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:23:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 22:23:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-05 22:23:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 22:23:53,442 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 22:23:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:53,442 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 22:23:53,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 22:23:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:53,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:53,442 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:53,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15422,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:53,643 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1400046269, now seen corresponding path program 537 times [2021-06-05 22:23:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:53,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379700736] [2021-06-05 22:23:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:53,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379700736] [2021-06-05 22:23:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379700736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496619636] [2021-06-05 22:23:53,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:53,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:23:53,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:53,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:53,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:53,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:53,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:53,969 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:53,969 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:53,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:53,970 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:54,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496619636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:54,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:54,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621068601] [2021-06-05 22:23:54,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:54,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:54,028 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:54,451 INFO L93 Difference]: Finished difference Result 389 states and 930 transitions. [2021-06-05 22:23:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:23:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:54,452 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:23:54,452 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:23:54,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:23:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:23:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 22:23:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 22:23:54,455 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 22:23:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:54,455 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 22:23:54,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 22:23:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:54,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:54,456 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:54,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15433,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:54,656 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 952708546, now seen corresponding path program 538 times [2021-06-05 22:23:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824661003] [2021-06-05 22:23:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:54,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:54,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824661003] [2021-06-05 22:23:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824661003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:54,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003070786] [2021-06-05 22:23:54,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:54,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:23:54,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:54,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:23:54,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:54,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:54,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:54,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:54,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:54,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:54,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:54,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:54,952 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:23:54,953 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:54,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:54,954 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:23:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003070786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:55,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:55,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:55,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630718198] [2021-06-05 22:23:55,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:55,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:55,002 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:55,846 INFO L93 Difference]: Finished difference Result 389 states and 935 transitions. [2021-06-05 22:23:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:23:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:55,846 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:23:55,846 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:23:55,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 818.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:23:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:23:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 22:23:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 22:23:55,849 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 22:23:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:55,850 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 22:23:55,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 22:23:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:55,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:55,850 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:56,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15449,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:56,050 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:56,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1030088699, now seen corresponding path program 539 times [2021-06-05 22:23:56,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:56,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252118744] [2021-06-05 22:23:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:56,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:56,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252118744] [2021-06-05 22:23:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252118744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900093635] [2021-06-05 22:23:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:56,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:23:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:56,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:56,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:56,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:56,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:56,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:56,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:56,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:56,366 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:23:56,366 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:56,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:23:56,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:23:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900093635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:56,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:56,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105694372] [2021-06-05 22:23:56,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:56,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:56,440 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:57,040 INFO L93 Difference]: Finished difference Result 393 states and 932 transitions. [2021-06-05 22:23:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:23:57,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:57,041 INFO L225 Difference]: With dead ends: 393 [2021-06-05 22:23:57,041 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:23:57,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:23:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:23:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 304. [2021-06-05 22:23:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 22:23:57,044 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 22:23:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:57,044 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 22:23:57,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 22:23:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:57,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:57,045 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:57,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15458 [2021-06-05 22:23:57,245 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 417478744, now seen corresponding path program 540 times [2021-06-05 22:23:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:57,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620631758] [2021-06-05 22:23:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:57,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:57,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620631758] [2021-06-05 22:23:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620631758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:57,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436564568] [2021-06-05 22:23:57,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:57,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:23:57,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:57,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:57,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:57,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:57,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:57,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:57,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:57,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,533 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:57,533 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:57,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:57,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:57,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436564568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:57,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:57,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:57,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365049200] [2021-06-05 22:23:57,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:57,560 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:58,460 INFO L93 Difference]: Finished difference Result 379 states and 929 transitions. [2021-06-05 22:23:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:23:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:58,460 INFO L225 Difference]: With dead ends: 379 [2021-06-05 22:23:58,461 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 22:23:58,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 864.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:23:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 22:23:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2021-06-05 22:23:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 22:23:58,464 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 22:23:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:58,464 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 22:23:58,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 22:23:58,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:58,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:58,464 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:58,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15471,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:58,665 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 45622457, now seen corresponding path program 541 times [2021-06-05 22:23:58,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:58,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276161649] [2021-06-05 22:23:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:58,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:58,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276161649] [2021-06-05 22:23:58,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276161649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:58,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746325397] [2021-06-05 22:23:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:58,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:58,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:58,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:23:58,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:58,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:59,009 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:23:59,009 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:59,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:23:59,010 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:23:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:59,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746325397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:59,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:59,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:59,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609823566] [2021-06-05 22:23:59,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:59,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:59,041 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:23:59,407 INFO L93 Difference]: Finished difference Result 334 states and 833 transitions. [2021-06-05 22:23:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:23:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:23:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:23:59,408 INFO L225 Difference]: With dead ends: 334 [2021-06-05 22:23:59,408 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:23:59,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:23:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:23:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2021-06-05 22:23:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 22:23:59,414 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 22:23:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:23:59,415 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 22:23:59,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:23:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 22:23:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:23:59,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:23:59,415 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:23:59,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-06-05 22:23:59,615 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:23:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:23:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1005224066, now seen corresponding path program 542 times [2021-06-05 22:23:59,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:23:59,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404254935] [2021-06-05 22:23:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:23:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:23:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:59,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:23:59,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404254935] [2021-06-05 22:23:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404254935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:59,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982897405] [2021-06-05 22:23:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:23:59,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:23:59,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:23:59,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:23:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:23:59,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:59,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:59,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:23:59,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:59,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:23:59,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:23:59,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:23:59,897 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:23:59,897 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:23:59,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:23:59,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:23:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:23:59,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982897405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:23:59,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:23:59,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:23:59,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437761774] [2021-06-05 22:23:59,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:23:59,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:23:59,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:23:59,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:23:59,923 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:00,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:00,345 INFO L93 Difference]: Finished difference Result 358 states and 888 transitions. [2021-06-05 22:24:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:00,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:00,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:00,346 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:24:00,346 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 22:24:00,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:24:00,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 22:24:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 303. [2021-06-05 22:24:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 22:24:00,349 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 22:24:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:00,349 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 22:24:00,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 22:24:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:00,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:00,350 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:00,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:00,550 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -967070075, now seen corresponding path program 543 times [2021-06-05 22:24:00,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:00,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433103585] [2021-06-05 22:24:00,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:00,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433103585] [2021-06-05 22:24:00,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433103585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940088907] [2021-06-05 22:24:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:00,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:24:00,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:00,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:00,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:00,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:00,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:00,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:00,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:00,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:00,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:00,900 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:00,900 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:00,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:00,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:00,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940088907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:00,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:00,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:00,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209023913] [2021-06-05 22:24:00,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:00,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:00,931 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:01,191 INFO L93 Difference]: Finished difference Result 327 states and 821 transitions. [2021-06-05 22:24:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:01,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:01,192 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:24:01,192 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:24:01,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:24:01,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 306. [2021-06-05 22:24:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.580327868852459) internal successors, (787), 305 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 787 transitions. [2021-06-05 22:24:01,195 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 787 transitions. Word has length 19 [2021-06-05 22:24:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:01,195 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 787 transitions. [2021-06-05 22:24:01,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 787 transitions. [2021-06-05 22:24:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:01,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:01,195 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:01,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15492,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:01,396 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:01,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2045459864, now seen corresponding path program 544 times [2021-06-05 22:24:01,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:01,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212787377] [2021-06-05 22:24:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:01,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:01,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212787377] [2021-06-05 22:24:01,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212787377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:01,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224420548] [2021-06-05 22:24:01,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:01,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:01,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:01,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:01,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:01,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:01,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:01,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:01,677 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:01,677 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:01,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:01,678 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:01,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224420548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:01,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:01,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:01,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257489896] [2021-06-05 22:24:01,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:01,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:01,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:01,703 INFO L87 Difference]: Start difference. First operand 306 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:01,920 INFO L93 Difference]: Finished difference Result 351 states and 870 transitions. [2021-06-05 22:24:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:01,921 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:24:01,921 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 22:24:01,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 22:24:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-06-05 22:24:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.5728476821192054) internal successors, (777), 302 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 777 transitions. [2021-06-05 22:24:01,924 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 777 transitions. Word has length 19 [2021-06-05 22:24:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:01,924 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 777 transitions. [2021-06-05 22:24:01,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 777 transitions. [2021-06-05 22:24:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:01,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:01,925 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:02,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-06-05 22:24:02,125 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1999199801, now seen corresponding path program 545 times [2021-06-05 22:24:02,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:02,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747156423] [2021-06-05 22:24:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:02,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:02,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747156423] [2021-06-05 22:24:02,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747156423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:02,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865291735] [2021-06-05 22:24:02,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:02,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:02,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:02,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:02,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:02,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:02,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:02,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:02,465 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:02,465 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:02,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:02,466 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865291735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:02,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:02,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:02,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572199245] [2021-06-05 22:24:02,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:02,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:02,497 INFO L87 Difference]: Start difference. First operand 303 states and 777 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:02,667 INFO L93 Difference]: Finished difference Result 325 states and 809 transitions. [2021-06-05 22:24:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:02,668 INFO L225 Difference]: With dead ends: 325 [2021-06-05 22:24:02,668 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 22:24:02,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:24:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 22:24:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2021-06-05 22:24:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.566225165562914) internal successors, (775), 302 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 775 transitions. [2021-06-05 22:24:02,671 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 775 transitions. Word has length 19 [2021-06-05 22:24:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:02,671 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 775 transitions. [2021-06-05 22:24:02,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 775 transitions. [2021-06-05 22:24:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:02,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:02,671 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:02,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-06-05 22:24:02,872 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2021031274, now seen corresponding path program 546 times [2021-06-05 22:24:02,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:02,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920100573] [2021-06-05 22:24:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:02,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:02,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920100573] [2021-06-05 22:24:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920100573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:02,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64417852] [2021-06-05 22:24:02,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:02,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:03,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:03,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:03,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:03,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:03,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:03,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:03,208 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:03,208 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:03,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:03,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:03,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64417852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:03,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:03,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:03,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862833247] [2021-06-05 22:24:03,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:03,240 INFO L87 Difference]: Start difference. First operand 303 states and 775 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:03,655 INFO L93 Difference]: Finished difference Result 421 states and 959 transitions. [2021-06-05 22:24:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:24:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:03,656 INFO L225 Difference]: With dead ends: 421 [2021-06-05 22:24:03,656 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 22:24:03,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:24:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 22:24:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 309. [2021-06-05 22:24:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.5551948051948052) internal successors, (787), 308 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 787 transitions. [2021-06-05 22:24:03,659 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 787 transitions. Word has length 19 [2021-06-05 22:24:03,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:03,659 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 787 transitions. [2021-06-05 22:24:03,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 787 transitions. [2021-06-05 22:24:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:03,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:03,660 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:03,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15524 [2021-06-05 22:24:03,860 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:03,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:03,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2059863861, now seen corresponding path program 547 times [2021-06-05 22:24:03,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:03,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343250366] [2021-06-05 22:24:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:03,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:03,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343250366] [2021-06-05 22:24:03,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343250366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:03,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143303568] [2021-06-05 22:24:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:03,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:04,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:04,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:04,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:04,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:04,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:04,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,142 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:04,142 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:04,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,143 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143303568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:04,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:04,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:04,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911737682] [2021-06-05 22:24:04,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:04,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:04,166 INFO L87 Difference]: Start difference. First operand 309 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:04,402 INFO L93 Difference]: Finished difference Result 458 states and 1048 transitions. [2021-06-05 22:24:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:04,403 INFO L225 Difference]: With dead ends: 458 [2021-06-05 22:24:04,403 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:24:04,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:24:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 323. [2021-06-05 22:24:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.5527950310559007) internal successors, (822), 322 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 822 transitions. [2021-06-05 22:24:04,406 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 822 transitions. Word has length 19 [2021-06-05 22:24:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 822 transitions. [2021-06-05 22:24:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 822 transitions. [2021-06-05 22:24:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:04,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:04,407 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:04,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15537 [2021-06-05 22:24:04,607 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:04,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1414450266, now seen corresponding path program 548 times [2021-06-05 22:24:04,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:04,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461391411] [2021-06-05 22:24:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:04,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:04,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461391411] [2021-06-05 22:24:04,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461391411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:04,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251798757] [2021-06-05 22:24:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:04,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:04,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:04,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:04,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:04,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:04,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:04,950 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:04,950 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:04,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:04,951 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:04,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251798757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:04,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:04,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:04,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698150051] [2021-06-05 22:24:04,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:04,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:04,981 INFO L87 Difference]: Start difference. First operand 323 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:05,561 INFO L93 Difference]: Finished difference Result 466 states and 1043 transitions. [2021-06-05 22:24:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:24:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:05,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:05,562 INFO L225 Difference]: With dead ends: 466 [2021-06-05 22:24:05,562 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 22:24:05,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:24:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 22:24:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 326. [2021-06-05 22:24:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.5507692307692307) internal successors, (829), 325 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 829 transitions. [2021-06-05 22:24:05,566 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 829 transitions. Word has length 19 [2021-06-05 22:24:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:05,566 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 829 transitions. [2021-06-05 22:24:05,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 829 transitions. [2021-06-05 22:24:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:05,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:05,566 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:05,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15541,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:05,767 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash 116475941, now seen corresponding path program 549 times [2021-06-05 22:24:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357725751] [2021-06-05 22:24:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:05,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357725751] [2021-06-05 22:24:05,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357725751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:05,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865138583] [2021-06-05 22:24:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:05,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:24:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:05,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:06,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:06,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:06,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:06,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:06,052 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:06,052 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:06,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:06,052 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865138583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:06,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:06,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:06,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503031845] [2021-06-05 22:24:06,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:06,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:06,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:06,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:06,076 INFO L87 Difference]: Start difference. First operand 326 states and 829 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:06,539 INFO L93 Difference]: Finished difference Result 503 states and 1147 transitions. [2021-06-05 22:24:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:06,540 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:24:06,540 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 22:24:06,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:24:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 22:24:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 313. [2021-06-05 22:24:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.5608974358974357) internal successors, (799), 312 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 799 transitions. [2021-06-05 22:24:06,543 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 799 transitions. Word has length 19 [2021-06-05 22:24:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:06,543 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 799 transitions. [2021-06-05 22:24:06,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 799 transitions. [2021-06-05 22:24:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:06,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:06,544 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:06,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:06,744 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash -278346262, now seen corresponding path program 550 times [2021-06-05 22:24:06,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:06,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389816789] [2021-06-05 22:24:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:06,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:06,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389816789] [2021-06-05 22:24:06,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389816789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:06,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417250169] [2021-06-05 22:24:06,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:06,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:07,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:07,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:07,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:07,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:07,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:07,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:07,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:07,112 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:07,113 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:07,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:07,114 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:07,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417250169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:07,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:07,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:07,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865741314] [2021-06-05 22:24:07,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:07,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:07,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:07,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:07,144 INFO L87 Difference]: Start difference. First operand 313 states and 799 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:07,793 INFO L93 Difference]: Finished difference Result 427 states and 971 transitions. [2021-06-05 22:24:07,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:24:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:07,793 INFO L225 Difference]: With dead ends: 427 [2021-06-05 22:24:07,793 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 22:24:07,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:24:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 22:24:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2021-06-05 22:24:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.548076923076923) internal successors, (795), 312 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 795 transitions. [2021-06-05 22:24:07,797 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 795 transitions. Word has length 19 [2021-06-05 22:24:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:07,797 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 795 transitions. [2021-06-05 22:24:07,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 795 transitions. [2021-06-05 22:24:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:07,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:07,797 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:07,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-06-05 22:24:07,998 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 463775115, now seen corresponding path program 551 times [2021-06-05 22:24:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:07,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348751447] [2021-06-05 22:24:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:08,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348751447] [2021-06-05 22:24:08,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348751447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:08,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996641847] [2021-06-05 22:24:08,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:08,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:08,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:08,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:08,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:08,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:08,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:08,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:08,311 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:08,312 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:08,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:08,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996641847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:08,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:08,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:08,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920680587] [2021-06-05 22:24:08,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:08,336 INFO L87 Difference]: Start difference. First operand 313 states and 795 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:09,307 INFO L93 Difference]: Finished difference Result 503 states and 1129 transitions. [2021-06-05 22:24:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:24:09,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:09,308 INFO L225 Difference]: With dead ends: 503 [2021-06-05 22:24:09,308 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 22:24:09,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:24:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 22:24:09,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2021-06-05 22:24:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.513793103448276) internal successors, (729), 290 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 729 transitions. [2021-06-05 22:24:09,311 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 729 transitions. Word has length 19 [2021-06-05 22:24:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:09,311 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 729 transitions. [2021-06-05 22:24:09,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 729 transitions. [2021-06-05 22:24:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:09,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:09,312 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:09,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15571,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:09,512 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:09,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -518792410, now seen corresponding path program 552 times [2021-06-05 22:24:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:09,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368200197] [2021-06-05 22:24:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:09,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:09,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368200197] [2021-06-05 22:24:09,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368200197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789351027] [2021-06-05 22:24:09,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:09,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:24:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:09,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:09,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:09,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:09,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:09,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:09,835 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:09,835 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:09,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:09,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:09,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789351027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:09,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:09,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:09,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665181124] [2021-06-05 22:24:09,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:09,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:09,893 INFO L87 Difference]: Start difference. First operand 291 states and 729 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:10,884 INFO L93 Difference]: Finished difference Result 472 states and 1016 transitions. [2021-06-05 22:24:10,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:24:10,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:10,885 INFO L225 Difference]: With dead ends: 472 [2021-06-05 22:24:10,885 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:24:10,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:24:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:24:10,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 296. [2021-06-05 22:24:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.528813559322034) internal successors, (746), 295 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 746 transitions. [2021-06-05 22:24:10,888 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 746 transitions. Word has length 19 [2021-06-05 22:24:10,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:10,888 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 746 transitions. [2021-06-05 22:24:10,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 746 transitions. [2021-06-05 22:24:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:10,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:10,888 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:11,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15575,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:11,089 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -771947675, now seen corresponding path program 553 times [2021-06-05 22:24:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:11,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996701737] [2021-06-05 22:24:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:11,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996701737] [2021-06-05 22:24:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996701737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294592101] [2021-06-05 22:24:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:11,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:11,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:11,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:11,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:11,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:11,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:11,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:11,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:11,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:11,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:11,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:11,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:11,380 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:24:11,380 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:11,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:11,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:11,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294592101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:11,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:11,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129919676] [2021-06-05 22:24:11,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:11,431 INFO L87 Difference]: Start difference. First operand 296 states and 746 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:12,321 INFO L93 Difference]: Finished difference Result 466 states and 1010 transitions. [2021-06-05 22:24:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:24:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:12,321 INFO L225 Difference]: With dead ends: 466 [2021-06-05 22:24:12,321 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:24:12,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:24:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:24:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-06-05 22:24:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.4965034965034967) internal successors, (714), 286 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 714 transitions. [2021-06-05 22:24:12,324 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 714 transitions. Word has length 19 [2021-06-05 22:24:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:12,325 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 714 transitions. [2021-06-05 22:24:12,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 714 transitions. [2021-06-05 22:24:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:12,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:12,325 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:12,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15593,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:12,525 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:12,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:12,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1219285398, now seen corresponding path program 554 times [2021-06-05 22:24:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:12,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960036616] [2021-06-05 22:24:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:12,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960036616] [2021-06-05 22:24:12,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960036616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:12,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319289557] [2021-06-05 22:24:12,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:12,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:12,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:12,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:12,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:12,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:12,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:12,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:12,846 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:12,847 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:12,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:12,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319289557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:12,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:12,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:12,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065104143] [2021-06-05 22:24:12,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:12,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:12,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:12,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:12,895 INFO L87 Difference]: Start difference. First operand 287 states and 714 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:13,346 INFO L93 Difference]: Finished difference Result 388 states and 871 transitions. [2021-06-05 22:24:13,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:13,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:13,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:13,347 INFO L225 Difference]: With dead ends: 388 [2021-06-05 22:24:13,347 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 22:24:13,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:24:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 22:24:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 283. [2021-06-05 22:24:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.475177304964539) internal successors, (698), 282 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 698 transitions. [2021-06-05 22:24:13,350 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 698 transitions. Word has length 19 [2021-06-05 22:24:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:13,350 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 698 transitions. [2021-06-05 22:24:13,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 698 transitions. [2021-06-05 22:24:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:13,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:13,350 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:13,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15603 [2021-06-05 22:24:13,550 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:13,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1092884653, now seen corresponding path program 555 times [2021-06-05 22:24:13,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:13,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058135971] [2021-06-05 22:24:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:13,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:13,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058135971] [2021-06-05 22:24:13,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058135971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:13,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13601894] [2021-06-05 22:24:13,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:13,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:24:13,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:13,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:13,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:13,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:13,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:13,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:13,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:13,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:13,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:13,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:13,853 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:13,890 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:24:13,890 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:13,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:13,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:13,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13601894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:13,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:13,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:24:13,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851991846] [2021-06-05 22:24:13,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:24:13,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:24:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:13,962 INFO L87 Difference]: Start difference. First operand 283 states and 698 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:14,978 INFO L93 Difference]: Finished difference Result 356 states and 818 transitions. [2021-06-05 22:24:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:24:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:14,979 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:24:14,979 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 22:24:14,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 997.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:24:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 22:24:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-06-05 22:24:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.475836431226766) internal successors, (666), 269 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 666 transitions. [2021-06-05 22:24:14,981 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 666 transitions. Word has length 19 [2021-06-05 22:24:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:14,982 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 666 transitions. [2021-06-05 22:24:14,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 666 transitions. [2021-06-05 22:24:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:14,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:14,982 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:15,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15619 [2021-06-05 22:24:15,183 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:15,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1003239920, now seen corresponding path program 556 times [2021-06-05 22:24:15,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:15,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192144109] [2021-06-05 22:24:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:15,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:15,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192144109] [2021-06-05 22:24:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192144109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809641080] [2021-06-05 22:24:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:15,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:15,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:15,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:15,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:15,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:15,442 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:15,442 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:15,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:15,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809641080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:15,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:15,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:15,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970337158] [2021-06-05 22:24:15,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:15,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:15,496 INFO L87 Difference]: Start difference. First operand 270 states and 666 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:15,903 INFO L93 Difference]: Finished difference Result 384 states and 882 transitions. [2021-06-05 22:24:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:24:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:15,903 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:24:15,903 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:24:15,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:24:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:24:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 280. [2021-06-05 22:24:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 22:24:15,906 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 22:24:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:15,906 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 22:24:15,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 22:24:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:15,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:15,907 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:16,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15632 [2021-06-05 22:24:16,107 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1256395185, now seen corresponding path program 557 times [2021-06-05 22:24:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:16,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891445733] [2021-06-05 22:24:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:16,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:16,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891445733] [2021-06-05 22:24:16,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891445733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:16,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425011111] [2021-06-05 22:24:16,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:16,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:16,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:16,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:16,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:16,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:16,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:16,412 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:24:16,412 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:16,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:16,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:16,431 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-05 22:24:16,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:16,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:16,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425011111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:16,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:16,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:16,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115630039] [2021-06-05 22:24:16,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:16,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:16,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:16,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:16,488 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:16,710 INFO L93 Difference]: Finished difference Result 368 states and 852 transitions. [2021-06-05 22:24:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:24:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:16,711 INFO L225 Difference]: With dead ends: 368 [2021-06-05 22:24:16,711 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 22:24:16,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 22:24:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 280. [2021-06-05 22:24:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 22:24:16,714 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 22:24:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:16,714 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 22:24:16,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 22:24:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:16,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:16,715 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15642,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:16,915 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1703732908, now seen corresponding path program 558 times [2021-06-05 22:24:16,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358265937] [2021-06-05 22:24:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:16,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:16,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358265937] [2021-06-05 22:24:16,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358265937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:16,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70906526] [2021-06-05 22:24:16,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:17,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:17,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:17,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:17,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:17,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:17,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:17,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:17,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:17,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:17,169 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:17,170 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:17,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:17,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:17,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70906526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:17,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:17,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:17,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60775514] [2021-06-05 22:24:17,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:17,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:17,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:17,216 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:17,509 INFO L93 Difference]: Finished difference Result 394 states and 901 transitions. [2021-06-05 22:24:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:17,510 INFO L225 Difference]: With dead ends: 394 [2021-06-05 22:24:17,510 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 22:24:17,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 22:24:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 278. [2021-06-05 22:24:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4981949458483754) internal successors, (692), 277 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 692 transitions. [2021-06-05 22:24:17,513 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 692 transitions. Word has length 19 [2021-06-05 22:24:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:17,513 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 692 transitions. [2021-06-05 22:24:17,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 692 transitions. [2021-06-05 22:24:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:17,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:17,513 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:17,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15659 [2021-06-05 22:24:17,714 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:17,714 INFO L82 PathProgramCache]: Analyzing trace with hash 608437143, now seen corresponding path program 559 times [2021-06-05 22:24:17,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:17,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778153802] [2021-06-05 22:24:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:17,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:17,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778153802] [2021-06-05 22:24:17,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778153802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:17,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105511454] [2021-06-05 22:24:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:17,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:17,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:17,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:18,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:18,039 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:24:18,039 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:18,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:18,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:18,057 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-06-05 22:24:18,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:18,058 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105511454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:18,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:18,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808886120] [2021-06-05 22:24:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:18,135 INFO L87 Difference]: Start difference. First operand 278 states and 692 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:18,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:18,568 INFO L93 Difference]: Finished difference Result 358 states and 822 transitions. [2021-06-05 22:24:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:24:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:18,569 INFO L225 Difference]: With dead ends: 358 [2021-06-05 22:24:18,569 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 22:24:18,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:24:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 22:24:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2021-06-05 22:24:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.4945454545454546) internal successors, (686), 275 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 686 transitions. [2021-06-05 22:24:18,572 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 686 transitions. Word has length 19 [2021-06-05 22:24:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:18,572 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 686 transitions. [2021-06-05 22:24:18,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 686 transitions. [2021-06-05 22:24:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:18,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:18,572 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:18,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15667 [2021-06-05 22:24:18,773 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2056004586, now seen corresponding path program 560 times [2021-06-05 22:24:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:18,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127765712] [2021-06-05 22:24:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:18,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:18,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127765712] [2021-06-05 22:24:18,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127765712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:18,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426558984] [2021-06-05 22:24:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:18,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:18,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:18,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:19,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:19,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:19,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:19,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,037 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:24:19,038 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:19,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:24:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:19,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426558984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:19,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:19,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:19,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102251148] [2021-06-05 22:24:19,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:19,061 INFO L87 Difference]: Start difference. First operand 276 states and 686 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:19,314 INFO L93 Difference]: Finished difference Result 344 states and 809 transitions. [2021-06-05 22:24:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:24:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:19,315 INFO L225 Difference]: With dead ends: 344 [2021-06-05 22:24:19,315 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:24:19,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:24:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:24:19,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 272. [2021-06-05 22:24:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4797047970479706) internal successors, (672), 271 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 672 transitions. [2021-06-05 22:24:19,318 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 672 transitions. Word has length 19 [2021-06-05 22:24:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:19,318 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 672 transitions. [2021-06-05 22:24:19,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:19,318 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 672 transitions. [2021-06-05 22:24:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:19,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:19,318 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:19,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15681 [2021-06-05 22:24:19,519 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1684148299, now seen corresponding path program 561 times [2021-06-05 22:24:19,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:19,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465869083] [2021-06-05 22:24:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:19,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465869083] [2021-06-05 22:24:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465869083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394349451] [2021-06-05 22:24:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:19,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:24:19,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:19,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:19,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:19,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:19,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,885 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:24:19,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:19,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:19,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:19,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_593 vanished before elimination [2021-06-05 22:24:19,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:19,903 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:24:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:19,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394349451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:19,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:19,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:19,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116707385] [2021-06-05 22:24:19,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:19,932 INFO L87 Difference]: Start difference. First operand 272 states and 672 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:20,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:20,188 INFO L93 Difference]: Finished difference Result 303 states and 718 transitions. [2021-06-05 22:24:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:20,189 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:24:20,189 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 22:24:20,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 22:24:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2021-06-05 22:24:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4884615384615385) internal successors, (647), 260 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 647 transitions. [2021-06-05 22:24:20,192 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 647 transitions. Word has length 19 [2021-06-05 22:24:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:20,192 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 647 transitions. [2021-06-05 22:24:20,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 647 transitions. [2021-06-05 22:24:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:20,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:20,192 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:20,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15685,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:20,393 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:20,393 INFO L82 PathProgramCache]: Analyzing trace with hash -228778518, now seen corresponding path program 562 times [2021-06-05 22:24:20,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:20,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122952030] [2021-06-05 22:24:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:20,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122952030] [2021-06-05 22:24:20,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122952030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:20,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305381707] [2021-06-05 22:24:20,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:20,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:20,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:20,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:20,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:20,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:20,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:20,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:20,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:20,689 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:20,689 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:20,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:20,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:20,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305381707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:20,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:20,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:20,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936346620] [2021-06-05 22:24:20,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:20,718 INFO L87 Difference]: Start difference. First operand 261 states and 647 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:21,147 INFO L93 Difference]: Finished difference Result 322 states and 746 transitions. [2021-06-05 22:24:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:21,148 INFO L225 Difference]: With dead ends: 322 [2021-06-05 22:24:21,148 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 22:24:21,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:24:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 22:24:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2021-06-05 22:24:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4806201550387597) internal successors, (640), 258 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 640 transitions. [2021-06-05 22:24:21,150 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 640 transitions. Word has length 19 [2021-06-05 22:24:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:21,150 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 640 transitions. [2021-06-05 22:24:21,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,151 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 640 transitions. [2021-06-05 22:24:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:21,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:21,151 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:21,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15712 [2021-06-05 22:24:21,351 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 513342859, now seen corresponding path program 563 times [2021-06-05 22:24:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:21,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848717983] [2021-06-05 22:24:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:21,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:21,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848717983] [2021-06-05 22:24:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848717983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:21,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343476540] [2021-06-05 22:24:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:21,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:21,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:21,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:21,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:21,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:21,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:21,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:21,597 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:21,597 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:21,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:21,598 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:21,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343476540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:21,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:21,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:21,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404978388] [2021-06-05 22:24:21,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:21,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:21,619 INFO L87 Difference]: Start difference. First operand 259 states and 640 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:21,951 INFO L93 Difference]: Finished difference Result 400 states and 907 transitions. [2021-06-05 22:24:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:24:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:21,952 INFO L225 Difference]: With dead ends: 400 [2021-06-05 22:24:21,952 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 22:24:21,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 22:24:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 263. [2021-06-05 22:24:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.4885496183206106) internal successors, (652), 262 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 652 transitions. [2021-06-05 22:24:21,955 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 652 transitions. Word has length 19 [2021-06-05 22:24:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:21,955 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 652 transitions. [2021-06-05 22:24:21,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 652 transitions. [2021-06-05 22:24:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:21,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:21,955 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:22,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15725,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:22,156 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:22,156 INFO L82 PathProgramCache]: Analyzing trace with hash -469224666, now seen corresponding path program 564 times [2021-06-05 22:24:22,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:22,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125171479] [2021-06-05 22:24:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:22,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125171479] [2021-06-05 22:24:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125171479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:22,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494630386] [2021-06-05 22:24:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:22,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:22,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:22,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:22,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:22,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:22,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:22,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:22,422 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:22,422 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:22,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:22,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:22,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494630386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:22,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:22,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:22,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231659503] [2021-06-05 22:24:22,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:22,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:22,475 INFO L87 Difference]: Start difference. First operand 263 states and 652 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:23,535 INFO L93 Difference]: Finished difference Result 468 states and 988 transitions. [2021-06-05 22:24:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:24:23,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:23,535 INFO L225 Difference]: With dead ends: 468 [2021-06-05 22:24:23,535 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 22:24:23,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:24:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 22:24:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 22:24:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 22:24:23,538 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 22:24:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:23,538 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 22:24:23,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 22:24:23,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:23,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:23,539 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:23,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15729 [2021-06-05 22:24:23,739 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:23,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:23,740 INFO L82 PathProgramCache]: Analyzing trace with hash -722379931, now seen corresponding path program 565 times [2021-06-05 22:24:23,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:23,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048766090] [2021-06-05 22:24:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:23,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:23,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048766090] [2021-06-05 22:24:23,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048766090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:23,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566448635] [2021-06-05 22:24:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:23,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:23,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:23,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:23,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:23,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:23,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:23,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:23,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:23,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:24,001 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:24:24,002 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:24,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:24,003 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566448635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:24,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:24,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176529449] [2021-06-05 22:24:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:24,047 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:24,538 INFO L93 Difference]: Finished difference Result 486 states and 1050 transitions. [2021-06-05 22:24:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:24:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:24,538 INFO L225 Difference]: With dead ends: 486 [2021-06-05 22:24:24,538 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 22:24:24,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:24:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 22:24:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 267. [2021-06-05 22:24:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 22:24:24,541 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 22:24:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:24,542 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 22:24:24,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 22:24:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:24,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:24,542 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:24,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-06-05 22:24:24,742 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1169717654, now seen corresponding path program 566 times [2021-06-05 22:24:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385659666] [2021-06-05 22:24:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:24,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385659666] [2021-06-05 22:24:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385659666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584481125] [2021-06-05 22:24:24,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:24,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:24,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:24,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:24,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:24,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:24,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:24,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:24,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:24,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:25,015 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:25,015 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:25,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:25,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:25,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584481125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:25,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:25,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:25,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890629658] [2021-06-05 22:24:25,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:25,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:25,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:25,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:25,060 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:25,523 INFO L93 Difference]: Finished difference Result 359 states and 829 transitions. [2021-06-05 22:24:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:25,523 INFO L225 Difference]: With dead ends: 359 [2021-06-05 22:24:25,523 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 22:24:25,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:24:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 22:24:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 264. [2021-06-05 22:24:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 22:24:25,526 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 22:24:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:25,526 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 22:24:25,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 22:24:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:25,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:25,527 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:25,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-06-05 22:24:25,727 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1142452397, now seen corresponding path program 567 times [2021-06-05 22:24:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:25,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077280484] [2021-06-05 22:24:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:25,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077280484] [2021-06-05 22:24:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077280484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:25,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906140767] [2021-06-05 22:24:25,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:25,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:24:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:25,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:25,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:25,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:25,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:25,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:25,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:25,974 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:24:25,974 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:25,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:25,975 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:26,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906140767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:26,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:26,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:26,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365955317] [2021-06-05 22:24:26,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:26,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:26,041 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:26,893 INFO L93 Difference]: Finished difference Result 445 states and 975 transitions. [2021-06-05 22:24:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:24:26,893 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:26,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:26,894 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:24:26,894 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 22:24:26,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:24:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 22:24:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 262. [2021-06-05 22:24:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4904214559386975) internal successors, (650), 261 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 650 transitions. [2021-06-05 22:24:26,897 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 650 transitions. Word has length 19 [2021-06-05 22:24:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:26,897 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 650 transitions. [2021-06-05 22:24:26,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 650 transitions. [2021-06-05 22:24:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:26,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:26,897 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:27,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15772 [2021-06-05 22:24:27,098 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:27,098 INFO L82 PathProgramCache]: Analyzing trace with hash 118520656, now seen corresponding path program 568 times [2021-06-05 22:24:27,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:27,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226265322] [2021-06-05 22:24:27,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226265322] [2021-06-05 22:24:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226265322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495411442] [2021-06-05 22:24:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:27,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:27,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:27,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:27,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:27,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:27,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:27,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:27,346 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:27,346 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:27,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:27,347 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:27,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495411442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:27,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:27,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380958094] [2021-06-05 22:24:27,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:27,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:27,400 INFO L87 Difference]: Start difference. First operand 262 states and 650 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:28,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:28,706 INFO L93 Difference]: Finished difference Result 534 states and 1133 transitions. [2021-06-05 22:24:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:24:28,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:28,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:28,706 INFO L225 Difference]: With dead ends: 534 [2021-06-05 22:24:28,707 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 22:24:28,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1184.9ms TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:24:28,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 22:24:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 274. [2021-06-05 22:24:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.5384615384615383) internal successors, (693), 273 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 693 transitions. [2021-06-05 22:24:28,710 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 693 transitions. Word has length 19 [2021-06-05 22:24:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:28,710 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 693 transitions. [2021-06-05 22:24:28,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:28,710 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 693 transitions. [2021-06-05 22:24:28,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:28,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:28,710 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:28,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:28,911 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:28,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:28,911 INFO L82 PathProgramCache]: Analyzing trace with hash -134634609, now seen corresponding path program 569 times [2021-06-05 22:24:28,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:28,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914678791] [2021-06-05 22:24:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:28,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914678791] [2021-06-05 22:24:28,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914678791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338398374] [2021-06-05 22:24:28,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:29,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:29,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:29,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:29,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:29,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:29,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:29,191 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:24:29,191 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:29,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:29,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:29,210 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-05 22:24:29,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:29,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:29,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338398374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:29,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:29,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:29,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997908215] [2021-06-05 22:24:29,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:29,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:29,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:29,266 INFO L87 Difference]: Start difference. First operand 274 states and 693 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:29,757 INFO L93 Difference]: Finished difference Result 390 states and 875 transitions. [2021-06-05 22:24:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:29,758 INFO L225 Difference]: With dead ends: 390 [2021-06-05 22:24:29,758 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 22:24:29,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:24:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 22:24:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2021-06-05 22:24:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5261194029850746) internal successors, (677), 268 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 677 transitions. [2021-06-05 22:24:29,760 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 677 transitions. Word has length 19 [2021-06-05 22:24:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:29,761 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 677 transitions. [2021-06-05 22:24:29,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 677 transitions. [2021-06-05 22:24:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:29,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:29,761 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:29,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15795,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:29,961 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash -581972332, now seen corresponding path program 570 times [2021-06-05 22:24:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:29,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539932590] [2021-06-05 22:24:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:30,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539932590] [2021-06-05 22:24:30,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539932590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:30,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745573849] [2021-06-05 22:24:30,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:30,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:30,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:30,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:30,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:30,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:30,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:30,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:30,214 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:30,214 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:30,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:30,215 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:30,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745573849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:30,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:30,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686541117] [2021-06-05 22:24:30,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:30,259 INFO L87 Difference]: Start difference. First operand 269 states and 677 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:30,862 INFO L93 Difference]: Finished difference Result 435 states and 976 transitions. [2021-06-05 22:24:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:24:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:30,862 INFO L225 Difference]: With dead ends: 435 [2021-06-05 22:24:30,862 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 22:24:30,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 553.8ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:24:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 22:24:30,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 261. [2021-06-05 22:24:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.480769230769231) internal successors, (645), 260 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 645 transitions. [2021-06-05 22:24:30,865 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 645 transitions. Word has length 19 [2021-06-05 22:24:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:30,865 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 645 transitions. [2021-06-05 22:24:30,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 645 transitions. [2021-06-05 22:24:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:30,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:30,866 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:31,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15806 [2021-06-05 22:24:31,066 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:31,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1730197719, now seen corresponding path program 571 times [2021-06-05 22:24:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:31,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772456918] [2021-06-05 22:24:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:31,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772456918] [2021-06-05 22:24:31,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772456918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:31,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404296393] [2021-06-05 22:24:31,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:31,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:31,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:31,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:31,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:31,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:31,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:31,306 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:31,349 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:24:31,349 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:31,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:31,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:31,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-05 22:24:31,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:31,368 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:31,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404296393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:31,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:31,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:31,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104693565] [2021-06-05 22:24:31,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:31,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:31,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:31,446 INFO L87 Difference]: Start difference. First operand 261 states and 645 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:32,170 INFO L93 Difference]: Finished difference Result 348 states and 783 transitions. [2021-06-05 22:24:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:24:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:32,171 INFO L225 Difference]: With dead ends: 348 [2021-06-05 22:24:32,171 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:24:32,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 682.5ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:24:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:24:32,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2021-06-05 22:24:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4767441860465116) internal successors, (639), 258 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 639 transitions. [2021-06-05 22:24:32,173 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 639 transitions. Word has length 19 [2021-06-05 22:24:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:32,173 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 639 transitions. [2021-06-05 22:24:32,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 639 transitions. [2021-06-05 22:24:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:32,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:32,174 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:32,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15814,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:32,374 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202134, now seen corresponding path program 572 times [2021-06-05 22:24:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:32,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140312109] [2021-06-05 22:24:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:32,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140312109] [2021-06-05 22:24:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140312109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612210436] [2021-06-05 22:24:32,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:32,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:32,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:32,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:32,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:32,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:32,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:32,626 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:24:32,626 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:32,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:32,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:24:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:32,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612210436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:32,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:32,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:32,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369481299] [2021-06-05 22:24:32,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:32,650 INFO L87 Difference]: Start difference. First operand 259 states and 639 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:32,919 INFO L93 Difference]: Finished difference Result 349 states and 805 transitions. [2021-06-05 22:24:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:24:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:32,920 INFO L225 Difference]: With dead ends: 349 [2021-06-05 22:24:32,920 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 22:24:32,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:24:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 22:24:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 251. [2021-06-05 22:24:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 22:24:32,923 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 22:24:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:32,924 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 22:24:32,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 22:24:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:32,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:32,924 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:33,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15828 [2021-06-05 22:24:33,141 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1489058421, now seen corresponding path program 573 times [2021-06-05 22:24:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101066558] [2021-06-05 22:24:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:33,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:33,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101066558] [2021-06-05 22:24:33,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101066558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:33,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760944183] [2021-06-05 22:24:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:33,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:24:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:33,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:33,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:33,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:33,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:33,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:33,544 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:24:33,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:33,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:33,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:33,561 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:33,561 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-05 22:24:33,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:33,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:24:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760944183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:33,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:33,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879833382] [2021-06-05 22:24:33,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:33,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:33,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:33,591 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:33,987 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2021-06-05 22:24:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:33,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:33,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:33,987 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:24:33,987 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:24:33,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:24:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:24:33,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 22:24:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4412955465587043) internal successors, (603), 247 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 603 transitions. [2021-06-05 22:24:33,990 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 603 transitions. Word has length 19 [2021-06-05 22:24:33,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:33,990 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 603 transitions. [2021-06-05 22:24:33,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:33,990 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 603 transitions. [2021-06-05 22:24:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:33,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:33,990 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:34,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15832 [2021-06-05 22:24:34,191 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1158756454, now seen corresponding path program 574 times [2021-06-05 22:24:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:34,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39745852] [2021-06-05 22:24:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:34,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:34,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39745852] [2021-06-05 22:24:34,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39745852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:34,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430531892] [2021-06-05 22:24:34,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:34,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:34,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:34,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:34,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:34,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:34,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:34,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:34,471 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:34,472 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:34,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:34,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430531892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:34,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:34,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:34,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908068412] [2021-06-05 22:24:34,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:34,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:34,527 INFO L87 Difference]: Start difference. First operand 248 states and 603 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:35,332 INFO L93 Difference]: Finished difference Result 376 states and 862 transitions. [2021-06-05 22:24:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:24:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:35,332 INFO L225 Difference]: With dead ends: 376 [2021-06-05 22:24:35,332 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 22:24:35,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 775.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:24:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 22:24:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 266. [2021-06-05 22:24:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 22:24:35,335 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 22:24:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:35,335 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 22:24:35,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 22:24:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:35,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:35,336 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:35,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15858 [2021-06-05 22:24:35,536 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash 905601189, now seen corresponding path program 575 times [2021-06-05 22:24:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:35,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116116614] [2021-06-05 22:24:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:35,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:35,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116116614] [2021-06-05 22:24:35,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116116614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:35,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258414331] [2021-06-05 22:24:35,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:35,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:24:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:35,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:35,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:35,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:35,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:35,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:35,863 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:24:35,863 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:35,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:35,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:35,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:35,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-05 22:24:35,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:35,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:35,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258414331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:35,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:35,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:35,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863531533] [2021-06-05 22:24:35,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:35,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:35,941 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:36,336 INFO L93 Difference]: Finished difference Result 339 states and 789 transitions. [2021-06-05 22:24:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:36,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:36,337 INFO L225 Difference]: With dead ends: 339 [2021-06-05 22:24:36,337 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:24:36,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:24:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 266. [2021-06-05 22:24:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 22:24:36,340 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 22:24:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:36,340 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 22:24:36,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 22:24:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:36,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:36,340 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:36,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15868,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:36,541 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:36,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 458263466, now seen corresponding path program 576 times [2021-06-05 22:24:36,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:36,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998607315] [2021-06-05 22:24:36,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:36,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998607315] [2021-06-05 22:24:36,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998607315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625369111] [2021-06-05 22:24:36,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:36,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:36,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:36,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:36,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:36,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:36,827 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:36,827 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:36,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:36,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:36,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625369111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:36,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:36,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:36,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551114704] [2021-06-05 22:24:36,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:36,875 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:37,484 INFO L93 Difference]: Finished difference Result 402 states and 911 transitions. [2021-06-05 22:24:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:24:37,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:37,485 INFO L225 Difference]: With dead ends: 402 [2021-06-05 22:24:37,485 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 22:24:37,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:24:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 22:24:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2021-06-05 22:24:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 22:24:37,488 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 22:24:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:37,488 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 22:24:37,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 22:24:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:37,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:37,488 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:37,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15879 [2021-06-05 22:24:37,689 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1524533779, now seen corresponding path program 577 times [2021-06-05 22:24:37,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:37,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718873252] [2021-06-05 22:24:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:37,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718873252] [2021-06-05 22:24:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718873252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890981668] [2021-06-05 22:24:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:37,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:38,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:38,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:38,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:38,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:38,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:38,147 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:24:38,148 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:38,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:38,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:38,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:38,170 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-05 22:24:38,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:38,171 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890981668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:38,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:38,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:38,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052412583] [2021-06-05 22:24:38,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:38,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:38,264 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:38,885 INFO L93 Difference]: Finished difference Result 333 states and 770 transitions. [2021-06-05 22:24:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:24:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:38,886 INFO L225 Difference]: With dead ends: 333 [2021-06-05 22:24:38,886 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 22:24:38,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:24:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 22:24:38,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2021-06-05 22:24:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4865900383141764) internal successors, (649), 261 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 649 transitions. [2021-06-05 22:24:38,890 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 649 transitions. Word has length 19 [2021-06-05 22:24:38,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:38,890 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 649 transitions. [2021-06-05 22:24:38,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 649 transitions. [2021-06-05 22:24:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:38,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:38,890 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:39,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15887,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:39,105 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash -76966336, now seen corresponding path program 578 times [2021-06-05 22:24:39,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:39,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39138541] [2021-06-05 22:24:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:39,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:39,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39138541] [2021-06-05 22:24:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39138541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904226600] [2021-06-05 22:24:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:39,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:39,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:39,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:39,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:39,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:39,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:39,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:39,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:39,415 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:24:39,415 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:39,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:39,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:24:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:39,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904226600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:39,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:39,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:39,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307803324] [2021-06-05 22:24:39,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:39,441 INFO L87 Difference]: Start difference. First operand 262 states and 649 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:39,873 INFO L93 Difference]: Finished difference Result 347 states and 809 transitions. [2021-06-05 22:24:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:39,874 INFO L225 Difference]: With dead ends: 347 [2021-06-05 22:24:39,874 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 22:24:39,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:24:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 22:24:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 258. [2021-06-05 22:24:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.470817120622568) internal successors, (635), 257 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 635 transitions. [2021-06-05 22:24:39,876 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 635 transitions. Word has length 19 [2021-06-05 22:24:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:39,876 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 635 transitions. [2021-06-05 22:24:39,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 635 transitions. [2021-06-05 22:24:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:39,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:39,877 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:40,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15907,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:40,077 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -448822623, now seen corresponding path program 579 times [2021-06-05 22:24:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:40,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142995129] [2021-06-05 22:24:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142995129] [2021-06-05 22:24:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142995129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873461996] [2021-06-05 22:24:40,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:40,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:24:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:40,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:40,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:40,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:40,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:40,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:40,547 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:24:40,547 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:40,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:40,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:40,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:40,564 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-06-05 22:24:40,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:40,565 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:24:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:40,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873461996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:40,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:40,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:40,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892654053] [2021-06-05 22:24:40,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:40,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:40,596 INFO L87 Difference]: Start difference. First operand 258 states and 635 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:40,915 INFO L93 Difference]: Finished difference Result 285 states and 679 transitions. [2021-06-05 22:24:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:40,916 INFO L225 Difference]: With dead ends: 285 [2021-06-05 22:24:40,916 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 22:24:40,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 22:24:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 256. [2021-06-05 22:24:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.466666666666667) internal successors, (629), 255 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 629 transitions. [2021-06-05 22:24:40,919 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 629 transitions. Word has length 19 [2021-06-05 22:24:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:40,919 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 629 transitions. [2021-06-05 22:24:40,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 629 transitions. [2021-06-05 22:24:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:40,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:40,920 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:41,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15911 [2021-06-05 22:24:41,120 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash 510778986, now seen corresponding path program 580 times [2021-06-05 22:24:41,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:41,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470088788] [2021-06-05 22:24:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:41,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470088788] [2021-06-05 22:24:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470088788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035376041] [2021-06-05 22:24:41,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:41,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:41,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:41,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:41,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:41,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:41,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:41,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:41,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:41,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:41,399 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:24:41,399 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:41,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:41,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:24:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:41,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035376041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:41,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:41,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:41,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027723968] [2021-06-05 22:24:41,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:41,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:41,424 INFO L87 Difference]: Start difference. First operand 256 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:41,716 INFO L93 Difference]: Finished difference Result 315 states and 738 transitions. [2021-06-05 22:24:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:41,716 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:24:41,716 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 22:24:41,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:24:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 22:24:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 252. [2021-06-05 22:24:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.450199203187251) internal successors, (615), 251 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2021-06-05 22:24:41,719 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 19 [2021-06-05 22:24:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:41,719 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2021-06-05 22:24:41,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2021-06-05 22:24:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:41,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:41,719 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:41,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15927,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:41,920 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1461515155, now seen corresponding path program 581 times [2021-06-05 22:24:41,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:41,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089925982] [2021-06-05 22:24:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:41,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:41,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089925982] [2021-06-05 22:24:41,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089925982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:41,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162036707] [2021-06-05 22:24:41,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:42,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:42,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:42,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:42,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:42,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:42,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:42,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:42,388 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:24:42,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:42,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:42,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:42,405 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:42,405 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-06-05 22:24:42,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:42,406 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:24:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:42,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162036707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:42,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:42,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:42,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883856322] [2021-06-05 22:24:42,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:42,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:42,436 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:42,683 INFO L93 Difference]: Finished difference Result 274 states and 650 transitions. [2021-06-05 22:24:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:42,684 INFO L225 Difference]: With dead ends: 274 [2021-06-05 22:24:42,684 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:24:42,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:24:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-06-05 22:24:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 22:24:42,686 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 22:24:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:42,686 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 22:24:42,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 22:24:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:42,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:42,686 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:42,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15931 [2021-06-05 22:24:42,887 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1182927888, now seen corresponding path program 582 times [2021-06-05 22:24:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:42,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165410107] [2021-06-05 22:24:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:42,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165410107] [2021-06-05 22:24:42,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165410107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:42,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915956630] [2021-06-05 22:24:42,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:42,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:43,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:43,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:43,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:43,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,205 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:43,205 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:43,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:43,206 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:43,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915956630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:43,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:43,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166594408] [2021-06-05 22:24:43,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:43,235 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:43,455 INFO L93 Difference]: Finished difference Result 285 states and 669 transitions. [2021-06-05 22:24:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:43,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:43,456 INFO L225 Difference]: With dead ends: 285 [2021-06-05 22:24:43,456 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 22:24:43,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 22:24:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 252. [2021-06-05 22:24:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 22:24:43,458 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 22:24:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:43,458 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 22:24:43,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 22:24:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:43,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:43,459 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:43,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15947,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:43,659 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:43,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1581113201, now seen corresponding path program 583 times [2021-06-05 22:24:43,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:43,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898805594] [2021-06-05 22:24:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:43,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898805594] [2021-06-05 22:24:43,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898805594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174904785] [2021-06-05 22:24:43,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:43,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:43,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:43,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:43,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:43,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:43,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,919 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:43,920 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:43,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:43,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:43,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174904785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:43,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:43,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:43,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755880095] [2021-06-05 22:24:43,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:43,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:43,943 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:44,278 INFO L93 Difference]: Finished difference Result 328 states and 765 transitions. [2021-06-05 22:24:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:24:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:44,279 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:24:44,279 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 22:24:44,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:24:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 22:24:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 252. [2021-06-05 22:24:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 22:24:44,281 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 22:24:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:44,282 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 22:24:44,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 22:24:44,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:44,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:44,282 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:44,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15960,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:44,482 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1975935404, now seen corresponding path program 584 times [2021-06-05 22:24:44,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:44,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846512401] [2021-06-05 22:24:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:44,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:44,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:44,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846512401] [2021-06-05 22:24:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846512401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:44,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624980243] [2021-06-05 22:24:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:44,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:44,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:44,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:44,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:44,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:44,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:44,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:44,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:44,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:44,805 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:24:44,805 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:44,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:24:44,806 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:24:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:44,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624980243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:44,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:44,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:44,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035761448] [2021-06-05 22:24:44,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:44,836 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:45,125 INFO L93 Difference]: Finished difference Result 284 states and 669 transitions. [2021-06-05 22:24:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:45,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:45,126 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:24:45,126 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 22:24:45,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:24:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 22:24:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-06-05 22:24:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 22:24:45,128 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 22:24:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:45,128 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 22:24:45,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 22:24:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:45,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:45,129 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:45,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15964 [2021-06-05 22:24:45,329 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1233814027, now seen corresponding path program 585 times [2021-06-05 22:24:45,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:45,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759461801] [2021-06-05 22:24:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:45,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:45,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759461801] [2021-06-05 22:24:45,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759461801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802031820] [2021-06-05 22:24:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:45,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:24:45,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:45,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:45,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:45,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:45,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:45,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:45,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:45,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:45,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:45,591 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:45,592 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:45,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:45,592 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802031820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:45,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444940249] [2021-06-05 22:24:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:45,615 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:46,073 INFO L93 Difference]: Finished difference Result 404 states and 917 transitions. [2021-06-05 22:24:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:24:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:46,073 INFO L225 Difference]: With dead ends: 404 [2021-06-05 22:24:46,073 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 22:24:46,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:24:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 22:24:46,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 253. [2021-06-05 22:24:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4404761904761907) internal successors, (615), 252 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 615 transitions. [2021-06-05 22:24:46,076 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 615 transitions. Word has length 19 [2021-06-05 22:24:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:46,076 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 615 transitions. [2021-06-05 22:24:46,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 615 transitions. [2021-06-05 22:24:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:46,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:46,077 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:46,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15977 [2021-06-05 22:24:46,277 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:46,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2078585744, now seen corresponding path program 586 times [2021-06-05 22:24:46,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:46,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888269881] [2021-06-05 22:24:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:46,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888269881] [2021-06-05 22:24:46,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888269881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:46,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278569090] [2021-06-05 22:24:46,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:46,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:46,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:46,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:46,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:46,574 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:46,574 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:46,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:46,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:46,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278569090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:46,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:46,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:46,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115594735] [2021-06-05 22:24:46,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:46,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:46,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:46,629 INFO L87 Difference]: Start difference. First operand 253 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:47,397 INFO L93 Difference]: Finished difference Result 333 states and 757 transitions. [2021-06-05 22:24:47,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:24:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:47,398 INFO L225 Difference]: With dead ends: 333 [2021-06-05 22:24:47,398 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:24:47,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:24:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:24:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2021-06-05 22:24:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 22:24:47,401 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 22:24:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:47,401 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 22:24:47,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 22:24:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:47,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:47,401 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:47,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15981 [2021-06-05 22:24:47,601 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:47,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1825430479, now seen corresponding path program 587 times [2021-06-05 22:24:47,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:47,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752195946] [2021-06-05 22:24:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:47,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752195946] [2021-06-05 22:24:47,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752195946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:47,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434787452] [2021-06-05 22:24:47,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:47,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:24:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:47,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:47,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:47,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:47,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:47,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:47,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:47,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:47,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:47,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:47,877 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:24:47,877 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:47,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:47,878 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:47,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434787452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:47,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:47,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:47,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765798132] [2021-06-05 22:24:47,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:47,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:47,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:47,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:47,925 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:48,723 INFO L93 Difference]: Finished difference Result 463 states and 1023 transitions. [2021-06-05 22:24:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:24:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:48,724 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:24:48,724 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:24:48,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 745.1ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:24:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:24:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 255. [2021-06-05 22:24:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 22:24:48,727 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 22:24:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:48,727 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 22:24:48,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:48,727 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 22:24:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:48,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:48,727 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:48,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15999 [2021-06-05 22:24:48,928 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1378092756, now seen corresponding path program 588 times [2021-06-05 22:24:48,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:48,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850630477] [2021-06-05 22:24:48,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:49,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:49,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850630477] [2021-06-05 22:24:49,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850630477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:49,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661774467] [2021-06-05 22:24:49,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:49,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:49,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:49,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:49,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:49,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:49,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:49,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:49,227 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:49,227 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:49,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:49,228 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:49,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661774467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:49,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:49,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:49,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059826253] [2021-06-05 22:24:49,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:49,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:49,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:49,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:49,274 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:49,699 INFO L93 Difference]: Finished difference Result 303 states and 715 transitions. [2021-06-05 22:24:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:24:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:49,700 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:24:49,700 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:24:49,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:24:49,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:24:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-06-05 22:24:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4426877470355732) internal successors, (618), 253 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 618 transitions. [2021-06-05 22:24:49,702 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 618 transitions. Word has length 19 [2021-06-05 22:24:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:49,702 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 618 transitions. [2021-06-05 22:24:49,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 618 transitions. [2021-06-05 22:24:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:49,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:49,703 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:49,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16009,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:49,903 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash -604704489, now seen corresponding path program 589 times [2021-06-05 22:24:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:49,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897189364] [2021-06-05 22:24:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:49,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:49,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897189364] [2021-06-05 22:24:49,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897189364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:49,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721875528] [2021-06-05 22:24:49,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:50,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:50,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:50,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:50,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:50,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:50,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:50,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:50,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:50,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:50,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:50,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:50,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:50,172 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:24:50,172 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:50,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:50,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:50,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721875528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:50,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:50,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:24:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8115143] [2021-06-05 22:24:50,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:24:50,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:50,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:24:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:24:50,247 INFO L87 Difference]: Start difference. First operand 254 states and 618 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:51,291 INFO L93 Difference]: Finished difference Result 392 states and 889 transitions. [2021-06-05 22:24:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:24:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:51,292 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:24:51,292 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 22:24:51,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:24:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 22:24:51,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 245. [2021-06-05 22:24:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4549180327868854) internal successors, (599), 244 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 599 transitions. [2021-06-05 22:24:51,295 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 599 transitions. Word has length 19 [2021-06-05 22:24:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:51,295 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 599 transitions. [2021-06-05 22:24:51,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 599 transitions. [2021-06-05 22:24:51,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:51,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:51,295 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:51,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16025 [2021-06-05 22:24:51,496 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash 928182347, now seen corresponding path program 590 times [2021-06-05 22:24:51,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:51,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740319964] [2021-06-05 22:24:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:51,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740319964] [2021-06-05 22:24:51,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740319964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:51,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107165338] [2021-06-05 22:24:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:51,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:51,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:51,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:51,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:51,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:51,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:51,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:51,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:51,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:51,738 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:24:51,738 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:51,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:24:51,739 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:24:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:51,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107165338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:51,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:51,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:51,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877191747] [2021-06-05 22:24:51,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:51,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:51,760 INFO L87 Difference]: Start difference. First operand 245 states and 599 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:52,084 INFO L93 Difference]: Finished difference Result 371 states and 827 transitions. [2021-06-05 22:24:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:52,084 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:24:52,084 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 22:24:52,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:24:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 22:24:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 247. [2021-06-05 22:24:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.459349593495935) internal successors, (605), 246 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 605 transitions. [2021-06-05 22:24:52,087 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 605 transitions. Word has length 19 [2021-06-05 22:24:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:52,087 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 605 transitions. [2021-06-05 22:24:52,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 605 transitions. [2021-06-05 22:24:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:52,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:52,087 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:52,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16038 [2021-06-05 22:24:52,288 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash -54385178, now seen corresponding path program 591 times [2021-06-05 22:24:52,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:52,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205844409] [2021-06-05 22:24:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:52,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:52,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205844409] [2021-06-05 22:24:52,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205844409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:52,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728583832] [2021-06-05 22:24:52,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:52,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:24:52,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:52,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:52,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:52,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:52,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:52,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:52,569 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:52,569 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:52,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:52,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728583832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:52,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:52,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:52,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404340622] [2021-06-05 22:24:52,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:52,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:52,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:52,623 INFO L87 Difference]: Start difference. First operand 247 states and 605 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:53,233 INFO L93 Difference]: Finished difference Result 367 states and 804 transitions. [2021-06-05 22:24:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:24:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:53,233 INFO L225 Difference]: With dead ends: 367 [2021-06-05 22:24:53,233 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 22:24:53,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 550.2ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:24:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 22:24:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 249. [2021-06-05 22:24:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 22:24:53,236 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 22:24:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:53,236 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 22:24:53,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 22:24:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:53,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:53,237 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:53,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16042 [2021-06-05 22:24:53,437 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash -307540443, now seen corresponding path program 592 times [2021-06-05 22:24:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:53,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833942705] [2021-06-05 22:24:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:53,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:53,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833942705] [2021-06-05 22:24:53,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833942705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:53,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745630547] [2021-06-05 22:24:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:53,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:24:53,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:53,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:53,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:53,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:53,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:53,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:53,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:53,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:53,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:53,650 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:53,687 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:24:53,687 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:53,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:53,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:53,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745630547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:53,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:53,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:53,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195118312] [2021-06-05 22:24:53,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:53,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:53,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:53,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:53,733 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:54,029 INFO L93 Difference]: Finished difference Result 420 states and 920 transitions. [2021-06-05 22:24:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:24:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:54,029 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:24:54,030 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 22:24:54,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:24:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 22:24:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 249. [2021-06-05 22:24:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 22:24:54,033 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 22:24:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:54,033 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 22:24:54,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 22:24:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:54,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:54,034 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:54,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16060,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:54,237 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -754878166, now seen corresponding path program 593 times [2021-06-05 22:24:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:54,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176402044] [2021-06-05 22:24:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:54,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176402044] [2021-06-05 22:24:54,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176402044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:54,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674152640] [2021-06-05 22:24:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:54,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:24:54,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:54,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:54,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:54,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:54,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:54,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:54,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:54,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:54,510 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:24:54,510 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:54,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:54,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:24:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:54,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674152640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:54,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:54,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:54,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65822198] [2021-06-05 22:24:54,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:54,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:54,555 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:54,938 INFO L93 Difference]: Finished difference Result 337 states and 762 transitions. [2021-06-05 22:24:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:24:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:54,939 INFO L225 Difference]: With dead ends: 337 [2021-06-05 22:24:54,939 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 22:24:54,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:54,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 22:24:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-06-05 22:24:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4615384615384617) internal successors, (608), 247 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 608 transitions. [2021-06-05 22:24:54,941 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 608 transitions. Word has length 19 [2021-06-05 22:24:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:54,941 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 608 transitions. [2021-06-05 22:24:54,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 608 transitions. [2021-06-05 22:24:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:54,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:54,942 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:55,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16069 [2021-06-05 22:24:55,142 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1557291885, now seen corresponding path program 594 times [2021-06-05 22:24:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:55,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763906813] [2021-06-05 22:24:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:55,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763906813] [2021-06-05 22:24:55,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763906813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:55,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210753316] [2021-06-05 22:24:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:55,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:24:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:55,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:55,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:55,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:55,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:55,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:24:55,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:55,390 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:24:55,390 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:55,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:55,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:24:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:55,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210753316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:55,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:55,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:55,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341843659] [2021-06-05 22:24:55,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:55,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:55,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:55,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:55,457 INFO L87 Difference]: Start difference. First operand 248 states and 608 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:55,966 INFO L93 Difference]: Finished difference Result 420 states and 904 transitions. [2021-06-05 22:24:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:24:55,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:55,966 INFO L225 Difference]: With dead ends: 420 [2021-06-05 22:24:55,966 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 22:24:55,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:24:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 22:24:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 246. [2021-06-05 22:24:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4612244897959186) internal successors, (603), 245 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:55,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 603 transitions. [2021-06-05 22:24:55,969 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 603 transitions. Word has length 19 [2021-06-05 22:24:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:55,969 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 603 transitions. [2021-06-05 22:24:55,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 603 transitions. [2021-06-05 22:24:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:55,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:55,970 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:56,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16085,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:56,170 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash 533360144, now seen corresponding path program 595 times [2021-06-05 22:24:56,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:56,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616608772] [2021-06-05 22:24:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:56,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:56,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616608772] [2021-06-05 22:24:56,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616608772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:56,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896437282] [2021-06-05 22:24:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:56,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:56,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:56,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:56,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:56,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:56,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:56,421 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:56,421 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:56,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:56,422 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:56,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896437282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:56,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:56,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:56,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42036990] [2021-06-05 22:24:56,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:56,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:56,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:56,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:56,474 INFO L87 Difference]: Start difference. First operand 246 states and 603 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:58,352 INFO L93 Difference]: Finished difference Result 638 states and 1284 transitions. [2021-06-05 22:24:58,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:24:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:58,353 INFO L225 Difference]: With dead ends: 638 [2021-06-05 22:24:58,353 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 22:24:58,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=546, Invalid=4010, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:24:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 22:24:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 264. [2021-06-05 22:24:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 22:24:58,356 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 22:24:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:58,356 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 22:24:58,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 22:24:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:58,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:58,357 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:58,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16098 [2021-06-05 22:24:58,557 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 280204879, now seen corresponding path program 596 times [2021-06-05 22:24:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162785902] [2021-06-05 22:24:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:58,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162785902] [2021-06-05 22:24:58,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162785902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147549754] [2021-06-05 22:24:58,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:58,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:24:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:58,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:58,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:58,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:58,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:58,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:58,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:24:58,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:58,848 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:24:58,848 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-06-05 22:24:58,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:24:58,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:58,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:24:58,866 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:58,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:58,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:24:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:58,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147549754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:58,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:58,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:58,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178358465] [2021-06-05 22:24:58,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:58,923 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:24:59,312 INFO L93 Difference]: Finished difference Result 389 states and 875 transitions. [2021-06-05 22:24:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:24:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:24:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:24:59,313 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:24:59,313 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:24:59,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:24:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:24:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 264. [2021-06-05 22:24:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 22:24:59,316 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 22:24:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:24:59,316 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 22:24:59,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:24:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 22:24:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:24:59,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:24:59,316 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:24:59,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16108,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:59,517 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:24:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:24:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash -167132844, now seen corresponding path program 597 times [2021-06-05 22:24:59,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:24:59,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166706613] [2021-06-05 22:24:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:24:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:24:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:24:59,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:24:59,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166706613] [2021-06-05 22:24:59,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166706613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:59,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57658557] [2021-06-05 22:24:59,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:24:59,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:24:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:24:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:24:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:24:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:59,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:24:59,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:59,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:24:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:24:59,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:24:59,778 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:24:59,778 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:24:59,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:24:59,779 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:24:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:24:59,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57658557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:24:59,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:24:59,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:24:59,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064159836] [2021-06-05 22:24:59,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:24:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:24:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:24:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:24:59,823 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:00,727 INFO L93 Difference]: Finished difference Result 512 states and 1095 transitions. [2021-06-05 22:25:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:25:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:00,728 INFO L225 Difference]: With dead ends: 512 [2021-06-05 22:25:00,728 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 22:25:00,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:25:00,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 22:25:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 258. [2021-06-05 22:25:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.5136186770428015) internal successors, (646), 257 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 646 transitions. [2021-06-05 22:25:00,732 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 646 transitions. Word has length 19 [2021-06-05 22:25:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:00,732 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 646 transitions. [2021-06-05 22:25:00,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 646 transitions. [2021-06-05 22:25:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:00,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:00,733 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:00,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16119,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:00,953 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:00,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2145037207, now seen corresponding path program 598 times [2021-06-05 22:25:00,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:00,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41178279] [2021-06-05 22:25:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:01,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41178279] [2021-06-05 22:25:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41178279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:01,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534960097] [2021-06-05 22:25:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:01,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:01,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:01,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:01,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:01,264 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:25:01,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:01,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:01,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:01,283 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:01,284 INFO L518 ElimStorePlain]: Eliminatee v_prenex_629 vanished before elimination [2021-06-05 22:25:01,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:01,285 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534960097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:01,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:25:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287717073] [2021-06-05 22:25:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:01,366 INFO L87 Difference]: Start difference. First operand 258 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:02,047 INFO L93 Difference]: Finished difference Result 411 states and 891 transitions. [2021-06-05 22:25:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:25:02,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:02,048 INFO L225 Difference]: With dead ends: 411 [2021-06-05 22:25:02,048 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 22:25:02,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 647.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:25:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 22:25:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 257. [2021-06-05 22:25:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.51171875) internal successors, (643), 256 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 643 transitions. [2021-06-05 22:25:02,051 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 643 transitions. Word has length 19 [2021-06-05 22:25:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:02,051 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 643 transitions. [2021-06-05 22:25:02,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 643 transitions. [2021-06-05 22:25:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:02,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:02,051 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:02,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16127,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:02,252 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash -702362646, now seen corresponding path program 599 times [2021-06-05 22:25:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:02,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989471877] [2021-06-05 22:25:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:02,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:02,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989471877] [2021-06-05 22:25:02,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989471877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:02,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553590611] [2021-06-05 22:25:02,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:02,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:02,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:02,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:02,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:02,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:02,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:02,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:02,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:02,528 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:02,528 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:02,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:02,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:02,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553590611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:02,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:02,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:25:02,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94812599] [2021-06-05 22:25:02,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:02,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:02,553 INFO L87 Difference]: Start difference. First operand 257 states and 643 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:03,011 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2021-06-05 22:25:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:25:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:03,012 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:25:03,012 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 22:25:03,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:25:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 22:25:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 254. [2021-06-05 22:25:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 22:25:03,015 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 22:25:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 22:25:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 22:25:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:03,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:03,015 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:03,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16141 [2021-06-05 22:25:03,216 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1074218933, now seen corresponding path program 600 times [2021-06-05 22:25:03,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:03,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961885912] [2021-06-05 22:25:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:03,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961885912] [2021-06-05 22:25:03,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961885912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:03,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389648909] [2021-06-05 22:25:03,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:03,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:25:03,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:03,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:03,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:03,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:03,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:03,527 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:03,527 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:03,564 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:03,564 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:03,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:03,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:03,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:03,581 INFO L518 ElimStorePlain]: Eliminatee v_prenex_634 vanished before elimination [2021-06-05 22:25:03,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:03,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389648909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:03,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:03,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 22:25:03,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803424003] [2021-06-05 22:25:03,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:03,611 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:04,131 INFO L93 Difference]: Finished difference Result 325 states and 743 transitions. [2021-06-05 22:25:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:25:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:04,132 INFO L225 Difference]: With dead ends: 325 [2021-06-05 22:25:04,132 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:25:04,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:25:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:25:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 253. [2021-06-05 22:25:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 22:25:04,135 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 22:25:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:04,135 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 22:25:04,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 22:25:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:04,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:04,135 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:04,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16145,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:04,336 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:04,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1573595942, now seen corresponding path program 601 times [2021-06-05 22:25:04,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:04,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163679566] [2021-06-05 22:25:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:04,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:04,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163679566] [2021-06-05 22:25:04,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163679566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:04,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473997953] [2021-06-05 22:25:04,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:04,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:04,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:04,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:04,623 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:04,623 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:04,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:04,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:04,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473997953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:04,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:04,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:04,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334601635] [2021-06-05 22:25:04,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:04,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:04,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:04,679 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:07,149 INFO L93 Difference]: Finished difference Result 573 states and 1191 transitions. [2021-06-05 22:25:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:25:07,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:07,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:07,150 INFO L225 Difference]: With dead ends: 573 [2021-06-05 22:25:07,150 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 22:25:07,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2360.7ms TimeCoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:25:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 22:25:07,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 266. [2021-06-05 22:25:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5283018867924527) internal successors, (670), 265 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 670 transitions. [2021-06-05 22:25:07,154 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 670 transitions. Word has length 19 [2021-06-05 22:25:07,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:07,154 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 670 transitions. [2021-06-05 22:25:07,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 670 transitions. [2021-06-05 22:25:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:07,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:07,154 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16162,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:07,355 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1320440677, now seen corresponding path program 602 times [2021-06-05 22:25:07,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:07,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487651202] [2021-06-05 22:25:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:07,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:07,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487651202] [2021-06-05 22:25:07,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487651202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855255110] [2021-06-05 22:25:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:07,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:07,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:07,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:07,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:07,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:07,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:07,813 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:25:07,813 INFO L518 ElimStorePlain]: Eliminatee v_prenex_637 vanished before elimination [2021-06-05 22:25:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:07,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:07,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:07,837 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:07,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:07,838 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:07,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855255110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:07,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:07,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:07,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41046635] [2021-06-05 22:25:07,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:07,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:07,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:07,915 INFO L87 Difference]: Start difference. First operand 266 states and 670 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:08,438 INFO L93 Difference]: Finished difference Result 369 states and 833 transitions. [2021-06-05 22:25:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:25:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:08,439 INFO L225 Difference]: With dead ends: 369 [2021-06-05 22:25:08,439 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 22:25:08,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:25:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 22:25:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 265. [2021-06-05 22:25:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.522727272727273) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 666 transitions. [2021-06-05 22:25:08,441 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 666 transitions. Word has length 19 [2021-06-05 22:25:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:08,441 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 666 transitions. [2021-06-05 22:25:08,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 666 transitions. [2021-06-05 22:25:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:08,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:08,442 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:08,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16172,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:08,642 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash 873102954, now seen corresponding path program 603 times [2021-06-05 22:25:08,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:08,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742832621] [2021-06-05 22:25:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:08,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742832621] [2021-06-05 22:25:08,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742832621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:08,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381823075] [2021-06-05 22:25:08,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:08,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:08,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:08,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:08,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:08,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:08,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:08,933 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:08,933 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:08,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:08,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381823075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:08,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:08,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:08,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643588792] [2021-06-05 22:25:08,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:08,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:08,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:08,981 INFO L87 Difference]: Start difference. First operand 265 states and 666 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:10,406 INFO L93 Difference]: Finished difference Result 499 states and 1069 transitions. [2021-06-05 22:25:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:25:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:10,407 INFO L225 Difference]: With dead ends: 499 [2021-06-05 22:25:10,407 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 22:25:10,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1335.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:25:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 22:25:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 254. [2021-06-05 22:25:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 22:25:10,410 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 22:25:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 22:25:10,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 22:25:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:10,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:10,411 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:10,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16189 [2021-06-05 22:25:10,611 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:10,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1109694291, now seen corresponding path program 604 times [2021-06-05 22:25:10,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:10,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370985987] [2021-06-05 22:25:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:10,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:10,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370985987] [2021-06-05 22:25:10,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370985987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:10,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558357829] [2021-06-05 22:25:10,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:10,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:10,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:10,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:10,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:10,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:10,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:10,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:10,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:10,943 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:25:10,944 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:10,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:10,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:10,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:10,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_640 vanished before elimination [2021-06-05 22:25:10,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:10,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:11,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558357829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:11,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:11,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603258069] [2021-06-05 22:25:11,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:11,042 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:11,758 INFO L93 Difference]: Finished difference Result 335 states and 758 transitions. [2021-06-05 22:25:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:25:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:11,759 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:25:11,759 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 22:25:11,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:25:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 22:25:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 253. [2021-06-05 22:25:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 22:25:11,762 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 22:25:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:11,762 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 22:25:11,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 22:25:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:11,762 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:11,762 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:11,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16197,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:11,963 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash 337873152, now seen corresponding path program 605 times [2021-06-05 22:25:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:11,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55010226] [2021-06-05 22:25:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:12,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:12,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55010226] [2021-06-05 22:25:12,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55010226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:12,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574079477] [2021-06-05 22:25:12,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:12,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:12,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:12,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:12,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:12,271 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:12,271 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:12,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:12,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:12,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574079477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:12,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:12,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:12,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054968614] [2021-06-05 22:25:12,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:12,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:12,297 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:13,435 INFO L93 Difference]: Finished difference Result 378 states and 859 transitions. [2021-06-05 22:25:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:25:13,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:13,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:13,436 INFO L225 Difference]: With dead ends: 378 [2021-06-05 22:25:13,436 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 22:25:13,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:25:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 22:25:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 247. [2021-06-05 22:25:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.4552845528455283) internal successors, (604), 246 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 604 transitions. [2021-06-05 22:25:13,439 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 604 transitions. Word has length 19 [2021-06-05 22:25:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:13,439 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 604 transitions. [2021-06-05 22:25:13,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 604 transitions. [2021-06-05 22:25:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:13,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:13,439 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:13,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16211 [2021-06-05 22:25:13,640 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:13,640 INFO L82 PathProgramCache]: Analyzing trace with hash -33983135, now seen corresponding path program 606 times [2021-06-05 22:25:13,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:13,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659909141] [2021-06-05 22:25:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:13,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:13,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659909141] [2021-06-05 22:25:13,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659909141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:13,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557342101] [2021-06-05 22:25:13,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:13,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:25:13,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:13,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:13,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:14,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:14,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:14,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:14,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,084 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:14,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:14,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:14,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:14,106 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:14,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_645 vanished before elimination [2021-06-05 22:25:14,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:14,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557342101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:14,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:14,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:14,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650819473] [2021-06-05 22:25:14,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:14,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:14,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:14,138 INFO L87 Difference]: Start difference. First operand 247 states and 604 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:14,655 INFO L93 Difference]: Finished difference Result 275 states and 649 transitions. [2021-06-05 22:25:14,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:25:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:14,656 INFO L225 Difference]: With dead ends: 275 [2021-06-05 22:25:14,656 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 22:25:14,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:25:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 22:25:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 246. [2021-06-05 22:25:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.453061224489796) internal successors, (601), 245 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 601 transitions. [2021-06-05 22:25:14,658 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 601 transitions. Word has length 19 [2021-06-05 22:25:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:14,658 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 601 transitions. [2021-06-05 22:25:14,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 601 transitions. [2021-06-05 22:25:14,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:14,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:14,659 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:14,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16215,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:14,859 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 925618474, now seen corresponding path program 607 times [2021-06-05 22:25:14,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:14,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338640574] [2021-06-05 22:25:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:14,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:14,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338640574] [2021-06-05 22:25:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338640574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:14,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139232726] [2021-06-05 22:25:14,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:15,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:15,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:15,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:15,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:15,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:15,171 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:15,171 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:15,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:15,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:15,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139232726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:15,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:15,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518108010] [2021-06-05 22:25:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:15,209 INFO L87 Difference]: Start difference. First operand 246 states and 601 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:15,577 INFO L93 Difference]: Finished difference Result 317 states and 732 transitions. [2021-06-05 22:25:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:25:15,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:15,578 INFO L225 Difference]: With dead ends: 317 [2021-06-05 22:25:15,578 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 22:25:15,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:25:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 22:25:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 240. [2021-06-05 22:25:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.430962343096234) internal successors, (581), 239 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 581 transitions. [2021-06-05 22:25:15,580 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 581 transitions. Word has length 19 [2021-06-05 22:25:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:15,580 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 581 transitions. [2021-06-05 22:25:15,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 581 transitions. [2021-06-05 22:25:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:15,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:15,581 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:15,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-06-05 22:25:15,781 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1046675667, now seen corresponding path program 608 times [2021-06-05 22:25:15,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:15,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999901083] [2021-06-05 22:25:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:25:15,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999901083] [2021-06-05 22:25:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999901083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955425785] [2021-06-05 22:25:15,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:15,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:15,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:16,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:16,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:16,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:16,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,191 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:16,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:16,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:16,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:16,208 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:16,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-06-05 22:25:16,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:16,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:16,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955425785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:16,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:16,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 22:25:16,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840467911] [2021-06-05 22:25:16,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:16,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:16,240 INFO L87 Difference]: Start difference. First operand 240 states and 581 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:16,649 INFO L93 Difference]: Finished difference Result 261 states and 614 transitions. [2021-06-05 22:25:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:25:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:16,650 INFO L225 Difference]: With dead ends: 261 [2021-06-05 22:25:16,650 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 22:25:16,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 511.9ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:25:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 22:25:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-06-05 22:25:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 22:25:16,652 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 22:25:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 22:25:16,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 22:25:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:16,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:16,653 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:16,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16235 [2021-06-05 22:25:16,853 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -538832688, now seen corresponding path program 609 times [2021-06-05 22:25:16,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:16,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717470931] [2021-06-05 22:25:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:16,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:16,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717470931] [2021-06-05 22:25:16,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717470931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:16,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359278998] [2021-06-05 22:25:16,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:17,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:25:17,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:17,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:17,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:17,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:17,236 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:17,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:17,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:17,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:17,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359278998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:17,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:17,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:17,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375229536] [2021-06-05 22:25:17,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:17,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:17,295 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:18,415 INFO L93 Difference]: Finished difference Result 322 states and 724 transitions. [2021-06-05 22:25:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:25:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:18,416 INFO L225 Difference]: With dead ends: 322 [2021-06-05 22:25:18,416 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 22:25:18,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1198.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:25:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 22:25:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 247. [2021-06-05 22:25:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 22:25:18,418 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 22:25:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:18,418 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 22:25:18,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:18,419 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 22:25:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:18,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:18,419 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:18,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16252 [2021-06-05 22:25:18,619 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:18,620 INFO L82 PathProgramCache]: Analyzing trace with hash -791987953, now seen corresponding path program 610 times [2021-06-05 22:25:18,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:18,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488615765] [2021-06-05 22:25:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:18,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:18,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488615765] [2021-06-05 22:25:18,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488615765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:18,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126933253] [2021-06-05 22:25:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:18,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:18,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:18,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:18,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:18,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:18,995 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:25:18,995 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:18,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:19,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:19,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-06-05 22:25:19,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:19,015 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126933253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:19,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:19,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:19,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201251058] [2021-06-05 22:25:19,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:19,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:19,080 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:19,481 INFO L93 Difference]: Finished difference Result 328 states and 736 transitions. [2021-06-05 22:25:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:25:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:19,482 INFO L225 Difference]: With dead ends: 328 [2021-06-05 22:25:19,482 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 22:25:19,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:25:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 22:25:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 247. [2021-06-05 22:25:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 22:25:19,484 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 22:25:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:19,485 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 22:25:19,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 22:25:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:19,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:19,485 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:19,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16262,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:19,686 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:19,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1239325676, now seen corresponding path program 611 times [2021-06-05 22:25:19,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:19,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328690737] [2021-06-05 22:25:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:19,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328690737] [2021-06-05 22:25:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328690737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805090672] [2021-06-05 22:25:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:19,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:19,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:19,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:20,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:20,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:20,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:20,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:20,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:20,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:20,042 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:20,042 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:20,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:20,043 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:20,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805090672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:20,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:20,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:20,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468337236] [2021-06-05 22:25:20,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:20,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:20,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:20,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:20,093 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:21,174 INFO L93 Difference]: Finished difference Result 335 states and 756 transitions. [2021-06-05 22:25:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:25:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:21,175 INFO L225 Difference]: With dead ends: 335 [2021-06-05 22:25:21,175 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 22:25:21,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1102.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:25:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 22:25:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 247. [2021-06-05 22:25:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 22:25:21,178 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 22:25:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:21,178 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 22:25:21,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:21,178 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 22:25:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:21,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:21,178 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:21,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16273 [2021-06-05 22:25:21,379 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:21,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:21,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1072844375, now seen corresponding path program 612 times [2021-06-05 22:25:21,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:21,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804090268] [2021-06-05 22:25:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:21,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:21,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804090268] [2021-06-05 22:25:21,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804090268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:21,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253972101] [2021-06-05 22:25:21,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:21,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:25:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:21,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:21,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:21,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:21,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:21,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:21,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:21,772 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:25:21,773 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:21,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:21,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:21,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:21,791 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-06-05 22:25:21,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:21,792 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:21,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253972101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:21,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:21,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435554913] [2021-06-05 22:25:21,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:21,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:21,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:21,881 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:22,522 INFO L93 Difference]: Finished difference Result 332 states and 738 transitions. [2021-06-05 22:25:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:25:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:22,522 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:25:22,522 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 22:25:22,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:25:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 22:25:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 246. [2021-06-05 22:25:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 22:25:22,525 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 22:25:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:22,525 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 22:25:22,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 22:25:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:22,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:22,526 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:22,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16281,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:22,726 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1774555478, now seen corresponding path program 613 times [2021-06-05 22:25:22,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:22,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941015550] [2021-06-05 22:25:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941015550] [2021-06-05 22:25:22,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941015550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:22,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275771496] [2021-06-05 22:25:22,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:23,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:23,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:23,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:23,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:23,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:23,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:23,055 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:23,055 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:23,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:23,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275771496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:23,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:23,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:23,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104971038] [2021-06-05 22:25:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:23,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:23,085 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:24,052 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2021-06-05 22:25:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:25:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:24,053 INFO L225 Difference]: With dead ends: 325 [2021-06-05 22:25:24,053 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 22:25:24,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 972.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:25:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 22:25:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 246. [2021-06-05 22:25:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 22:25:24,056 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 22:25:24,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:24,056 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 22:25:24,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:24,056 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 22:25:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:24,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:24,056 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-06-05 22:25:24,257 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2146411765, now seen corresponding path program 614 times [2021-06-05 22:25:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117688814] [2021-06-05 22:25:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117688814] [2021-06-05 22:25:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117688814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250973106] [2021-06-05 22:25:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:24,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:24,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:24,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:24,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:24,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:24,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:24,745 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:24,745 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:24,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:24,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:24,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:24,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_662 vanished before elimination [2021-06-05 22:25:24,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:24,764 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250973106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:24,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:24,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:24,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651080129] [2021-06-05 22:25:24,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:24,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:24,796 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:25,130 INFO L93 Difference]: Finished difference Result 278 states and 649 transitions. [2021-06-05 22:25:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:25,131 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:25:25,131 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:25:25,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:25:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:25:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-06-05 22:25:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 22:25:25,133 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 22:25:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:25,133 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 22:25:25,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 22:25:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:25,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:25,134 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:25,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:25,334 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1186810156, now seen corresponding path program 615 times [2021-06-05 22:25:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:25,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186793454] [2021-06-05 22:25:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186793454] [2021-06-05 22:25:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186793454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096171319] [2021-06-05 22:25:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:25,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:25:25,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:25,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:25,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:25,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:25,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:25,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:25,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:25,655 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:25,655 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:25,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:25,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:25,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096171319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:25,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:25,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:25,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786216522] [2021-06-05 22:25:25,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:25,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:25,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:25,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:25,682 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:26,206 INFO L93 Difference]: Finished difference Result 304 states and 709 transitions. [2021-06-05 22:25:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:25:26,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:26,207 INFO L225 Difference]: With dead ends: 304 [2021-06-05 22:25:26,207 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 22:25:26,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:25:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 22:25:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2021-06-05 22:25:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 22:25:26,209 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 22:25:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:26,209 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 22:25:26,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 22:25:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:26,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:26,210 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:26,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16321 [2021-06-05 22:25:26,410 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1135862999, now seen corresponding path program 616 times [2021-06-05 22:25:26,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:26,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702936774] [2021-06-05 22:25:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:26,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:26,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702936774] [2021-06-05 22:25:26,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702936774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:26,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167799478] [2021-06-05 22:25:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:26,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:26,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:26,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:26,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:26,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:26,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:26,857 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:26,857 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:26,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:26,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:26,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:26,874 INFO L518 ElimStorePlain]: Eliminatee v_prenex_666 vanished before elimination [2021-06-05 22:25:26,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:26,875 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167799478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:26,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:26,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:26,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764743476] [2021-06-05 22:25:26,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:26,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:26,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:26,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:26,907 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:27,275 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2021-06-05 22:25:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:27,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:27,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:27,276 INFO L225 Difference]: With dead ends: 272 [2021-06-05 22:25:27,276 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 22:25:27,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:25:27,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 22:25:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2021-06-05 22:25:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.4421487603305785) internal successors, (591), 242 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 591 transitions. [2021-06-05 22:25:27,278 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 591 transitions. Word has length 19 [2021-06-05 22:25:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:27,278 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 591 transitions. [2021-06-05 22:25:27,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 591 transitions. [2021-06-05 22:25:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:27,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:27,279 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:27,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16325,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:27,479 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -146574358, now seen corresponding path program 617 times [2021-06-05 22:25:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:27,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622135233] [2021-06-05 22:25:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:27,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622135233] [2021-06-05 22:25:27,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622135233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960426019] [2021-06-05 22:25:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:27,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:27,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:27,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:27,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:27,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:27,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:27,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:27,801 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:27,801 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:27,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:27,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:27,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960426019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:27,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:27,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:27,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323612535] [2021-06-05 22:25:27,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:27,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:27,828 INFO L87 Difference]: Start difference. First operand 243 states and 591 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:28,113 INFO L93 Difference]: Finished difference Result 292 states and 682 transitions. [2021-06-05 22:25:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:25:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:28,114 INFO L225 Difference]: With dead ends: 292 [2021-06-05 22:25:28,114 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 22:25:28,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:25:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 22:25:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2021-06-05 22:25:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 22:25:28,116 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 22:25:28,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:28,116 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 22:25:28,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 22:25:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:28,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:28,117 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:28,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16342 [2021-06-05 22:25:28,317 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -192834421, now seen corresponding path program 618 times [2021-06-05 22:25:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:28,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079652947] [2021-06-05 22:25:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:28,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079652947] [2021-06-05 22:25:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079652947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:28,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164776540] [2021-06-05 22:25:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:28,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:25:28,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:28,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:28,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:28,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:28,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:28,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:28,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:28,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:28,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:28,853 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:28,853 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:28,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:28,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:28,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:28,870 INFO L518 ElimStorePlain]: Eliminatee v_prenex_672 vanished before elimination [2021-06-05 22:25:28,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:28,870 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:28,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164776540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:28,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:28,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 22:25:28,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910872662] [2021-06-05 22:25:28,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:25:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:25:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:25:28,903 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:29,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:29,156 INFO L93 Difference]: Finished difference Result 262 states and 612 transitions. [2021-06-05 22:25:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:29,157 INFO L225 Difference]: With dead ends: 262 [2021-06-05 22:25:29,157 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 22:25:29,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:25:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 22:25:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 229. [2021-06-05 22:25:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.43859649122807) internal successors, (556), 228 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 556 transitions. [2021-06-05 22:25:29,160 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 556 transitions. Word has length 19 [2021-06-05 22:25:29,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:29,160 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 556 transitions. [2021-06-05 22:25:29,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:29,160 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 556 transitions. [2021-06-05 22:25:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:29,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:29,160 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:29,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16346 [2021-06-05 22:25:29,361 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2076858112, now seen corresponding path program 619 times [2021-06-05 22:25:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:29,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333789856] [2021-06-05 22:25:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333789856] [2021-06-05 22:25:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333789856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240723403] [2021-06-05 22:25:29,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:29,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:29,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:29,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:29,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:29,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:29,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:29,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:29,686 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:25:29,686 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:29,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:29,687 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:25:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:29,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240723403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:29,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:29,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:29,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658887318] [2021-06-05 22:25:29,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:29,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:29,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:29,723 INFO L87 Difference]: Start difference. First operand 229 states and 556 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:30,162 INFO L93 Difference]: Finished difference Result 360 states and 780 transitions. [2021-06-05 22:25:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:25:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:30,163 INFO L225 Difference]: With dead ends: 360 [2021-06-05 22:25:30,163 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:25:30,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:25:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:25:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 229. [2021-06-05 22:25:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.4342105263157894) internal successors, (555), 228 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 555 transitions. [2021-06-05 22:25:30,170 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 555 transitions. Word has length 19 [2021-06-05 22:25:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:30,171 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 555 transitions. [2021-06-05 22:25:30,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 555 transitions. [2021-06-05 22:25:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:30,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:30,171 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:30,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16372 [2021-06-05 22:25:30,373 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash -545931905, now seen corresponding path program 620 times [2021-06-05 22:25:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:30,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287823525] [2021-06-05 22:25:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:30,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:30,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287823525] [2021-06-05 22:25:30,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287823525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:30,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790760382] [2021-06-05 22:25:30,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:30,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:30,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:30,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:30,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:30,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:30,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:30,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:30,639 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:25:30,639 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:30,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:30,640 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:25:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790760382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:30,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:30,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629812077] [2021-06-05 22:25:30,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:30,663 INFO L87 Difference]: Start difference. First operand 229 states and 555 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:31,091 INFO L93 Difference]: Finished difference Result 447 states and 963 transitions. [2021-06-05 22:25:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:25:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:31,092 INFO L225 Difference]: With dead ends: 447 [2021-06-05 22:25:31,092 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 22:25:31,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:25:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 22:25:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 237. [2021-06-05 22:25:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.4364406779661016) internal successors, (575), 236 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 575 transitions. [2021-06-05 22:25:31,095 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 575 transitions. Word has length 19 [2021-06-05 22:25:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:31,095 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 575 transitions. [2021-06-05 22:25:31,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 575 transitions. [2021-06-05 22:25:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:31,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:31,095 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:31,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16385 [2021-06-05 22:25:31,296 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash -940754108, now seen corresponding path program 621 times [2021-06-05 22:25:31,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:31,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167836428] [2021-06-05 22:25:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:31,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167836428] [2021-06-05 22:25:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167836428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650169408] [2021-06-05 22:25:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:31,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:31,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:31,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:31,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:31,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:31,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:31,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:31,625 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:25:31,625 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:31,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:31,626 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:25:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:31,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650169408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:31,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:31,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:31,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727304216] [2021-06-05 22:25:31,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:31,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:31,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:31,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:31,656 INFO L87 Difference]: Start difference. First operand 237 states and 575 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:32,346 INFO L93 Difference]: Finished difference Result 385 states and 825 transitions. [2021-06-05 22:25:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:25:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:32,347 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:25:32,347 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 22:25:32,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 625.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:25:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 22:25:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 235. [2021-06-05 22:25:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.427350427350427) internal successors, (568), 234 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 568 transitions. [2021-06-05 22:25:32,349 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 568 transitions. Word has length 19 [2021-06-05 22:25:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:32,349 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 568 transitions. [2021-06-05 22:25:32,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 568 transitions. [2021-06-05 22:25:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:32,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:32,350 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:32,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16389 [2021-06-05 22:25:32,550 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:32,551 INFO L82 PathProgramCache]: Analyzing trace with hash -198632731, now seen corresponding path program 622 times [2021-06-05 22:25:32,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:32,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200484169] [2021-06-05 22:25:32,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:32,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:32,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200484169] [2021-06-05 22:25:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200484169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389528990] [2021-06-05 22:25:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:32,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:32,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:32,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:32,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:32,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:32,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:32,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:32,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:32,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:32,816 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:25:32,816 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:32,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:32,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:25:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:32,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389528990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:32,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:32,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:32,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631637184] [2021-06-05 22:25:32,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:32,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:32,840 INFO L87 Difference]: Start difference. First operand 235 states and 568 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:33,430 INFO L93 Difference]: Finished difference Result 494 states and 1060 transitions. [2021-06-05 22:25:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:25:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:33,431 INFO L225 Difference]: With dead ends: 494 [2021-06-05 22:25:33,431 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 22:25:33,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:25:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 22:25:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 225. [2021-06-05 22:25:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4375) internal successors, (546), 224 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 546 transitions. [2021-06-05 22:25:33,434 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 546 transitions. Word has length 19 [2021-06-05 22:25:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:33,434 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 546 transitions. [2021-06-05 22:25:33,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 546 transitions. [2021-06-05 22:25:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:33,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:33,434 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:33,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16404,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:33,635 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1181200256, now seen corresponding path program 623 times [2021-06-05 22:25:33,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:33,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639885335] [2021-06-05 22:25:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:33,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:33,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639885335] [2021-06-05 22:25:33,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639885335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:33,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742199101] [2021-06-05 22:25:33,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:33,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:25:33,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:33,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:33,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:33,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:33,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:33,940 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:25:33,941 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:33,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:33,942 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:25:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:33,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742199101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:33,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:33,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56433404] [2021-06-05 22:25:33,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:33,998 INFO L87 Difference]: Start difference. First operand 225 states and 546 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:35,112 INFO L93 Difference]: Finished difference Result 449 states and 929 transitions. [2021-06-05 22:25:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:25:35,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:35,113 INFO L225 Difference]: With dead ends: 449 [2021-06-05 22:25:35,113 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 22:25:35,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 943.4ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:25:35,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 22:25:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 229. [2021-06-05 22:25:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 22:25:35,116 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 22:25:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:35,116 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 22:25:35,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 22:25:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:35,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:35,117 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:35,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16408,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:35,317 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1434355521, now seen corresponding path program 624 times [2021-06-05 22:25:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:35,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943545493] [2021-06-05 22:25:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:35,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:35,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943545493] [2021-06-05 22:25:35,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943545493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:35,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015934037] [2021-06-05 22:25:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:35,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:25:35,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:35,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:35,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:35,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:35,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:35,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:35,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:35,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:35,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:35,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:35,594 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:25:35,594 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:35,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:35,595 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:25:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:35,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015934037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:35,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:35,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:35,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804091902] [2021-06-05 22:25:35,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:35,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:35,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:35,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:35,644 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:36,600 INFO L93 Difference]: Finished difference Result 584 states and 1209 transitions. [2021-06-05 22:25:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:25:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:36,601 INFO L225 Difference]: With dead ends: 584 [2021-06-05 22:25:36,601 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 22:25:36,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:25:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 22:25:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 229. [2021-06-05 22:25:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 22:25:36,604 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 22:25:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:36,604 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 22:25:36,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 22:25:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:36,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:36,605 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:36,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16426,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:36,805 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1881693244, now seen corresponding path program 625 times [2021-06-05 22:25:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:36,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294919748] [2021-06-05 22:25:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:36,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:36,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294919748] [2021-06-05 22:25:36,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294919748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582902755] [2021-06-05 22:25:36,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:37,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:37,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:37,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:37,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:37,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:37,108 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:25:37,108 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:37,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:37,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:25:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:37,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582902755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:37,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:37,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185263732] [2021-06-05 22:25:37,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:37,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:37,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:37,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:37,157 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:37,747 INFO L93 Difference]: Finished difference Result 382 states and 836 transitions. [2021-06-05 22:25:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:25:37,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:37,748 INFO L225 Difference]: With dead ends: 382 [2021-06-05 22:25:37,748 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 22:25:37,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:25:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 22:25:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 227. [2021-06-05 22:25:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4424778761061945) internal successors, (552), 226 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 552 transitions. [2021-06-05 22:25:37,750 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 552 transitions. Word has length 19 [2021-06-05 22:25:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:37,750 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 552 transitions. [2021-06-05 22:25:37,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 552 transitions. [2021-06-05 22:25:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:37,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:37,751 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:37,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16436,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:37,951 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash 430476807, now seen corresponding path program 626 times [2021-06-05 22:25:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995803160] [2021-06-05 22:25:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:38,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:38,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995803160] [2021-06-05 22:25:38,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995803160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:38,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543376743] [2021-06-05 22:25:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:38,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:38,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:38,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:38,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:38,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:38,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:38,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:38,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:38,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:38,326 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:25:38,326 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:38,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:38,328 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:25:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543376743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:38,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:38,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:25:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541471714] [2021-06-05 22:25:38,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:25:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:38,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:25:38,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:25:38,411 INFO L87 Difference]: Start difference. First operand 227 states and 552 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:39,845 INFO L93 Difference]: Finished difference Result 519 states and 1080 transitions. [2021-06-05 22:25:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:25:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:39,846 INFO L225 Difference]: With dead ends: 519 [2021-06-05 22:25:39,846 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:25:39,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1319.0ms TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:25:39,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:25:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 222. [2021-06-05 22:25:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.4434389140271495) internal successors, (540), 221 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 540 transitions. [2021-06-05 22:25:39,852 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 540 transitions. Word has length 19 [2021-06-05 22:25:39,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:39,852 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 540 transitions. [2021-06-05 22:25:39,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 540 transitions. [2021-06-05 22:25:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:39,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:39,852 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:40,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16446,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:40,053 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 446780864, now seen corresponding path program 627 times [2021-06-05 22:25:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550052575] [2021-06-05 22:25:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:40,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550052575] [2021-06-05 22:25:40,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550052575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:40,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714300211] [2021-06-05 22:25:40,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:40,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:25:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:40,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:40,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:40,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:40,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:40,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:40,310 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:40,310 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:40,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:40,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714300211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:40,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:40,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827566007] [2021-06-05 22:25:40,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:40,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:40,366 INFO L87 Difference]: Start difference. First operand 222 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:41,602 INFO L93 Difference]: Finished difference Result 523 states and 1059 transitions. [2021-06-05 22:25:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:25:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:41,603 INFO L225 Difference]: With dead ends: 523 [2021-06-05 22:25:41,603 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 22:25:41,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1134.7ms TimeCoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:25:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 22:25:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 227. [2021-06-05 22:25:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4646017699115044) internal successors, (557), 226 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 557 transitions. [2021-06-05 22:25:41,605 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 557 transitions. Word has length 19 [2021-06-05 22:25:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:41,606 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 557 transitions. [2021-06-05 22:25:41,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 557 transitions. [2021-06-05 22:25:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:41,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:41,606 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:41,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16459 [2021-06-05 22:25:41,806 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:41,807 INFO L82 PathProgramCache]: Analyzing trace with hash 193625599, now seen corresponding path program 628 times [2021-06-05 22:25:41,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:41,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794440958] [2021-06-05 22:25:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:41,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:41,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794440958] [2021-06-05 22:25:41,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794440958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:41,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50577621] [2021-06-05 22:25:41,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:41,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:41,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:42,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:42,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:42,106 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:42,155 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:25:42,156 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:42,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:42,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:42,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:42,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_674 vanished before elimination [2021-06-05 22:25:42,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:42,175 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:42,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50577621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:42,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:42,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:42,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653690953] [2021-06-05 22:25:42,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:42,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:42,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:42,231 INFO L87 Difference]: Start difference. First operand 227 states and 557 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:42,805 INFO L93 Difference]: Finished difference Result 384 states and 813 transitions. [2021-06-05 22:25:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:25:42,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:42,806 INFO L225 Difference]: With dead ends: 384 [2021-06-05 22:25:42,806 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 22:25:42,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:25:42,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 22:25:42,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 221. [2021-06-05 22:25:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 22:25:42,809 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 22:25:42,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:42,809 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 22:25:42,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 22:25:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:42,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:42,809 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:43,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16469,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:43,010 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash -253712124, now seen corresponding path program 629 times [2021-06-05 22:25:43,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:43,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916223441] [2021-06-05 22:25:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:43,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916223441] [2021-06-05 22:25:43,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916223441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126749417] [2021-06-05 22:25:43,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:43,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:25:43,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:43,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:43,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:43,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:43,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:43,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:43,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:43,273 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:43,274 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:43,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:43,274 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126749417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:43,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:43,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:43,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381606148] [2021-06-05 22:25:43,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:43,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:43,319 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:43,933 INFO L93 Difference]: Finished difference Result 423 states and 911 transitions. [2021-06-05 22:25:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:25:43,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:43,934 INFO L225 Difference]: With dead ends: 423 [2021-06-05 22:25:43,934 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 22:25:43,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:25:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 22:25:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 216. [2021-06-05 22:25:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4046511627906977) internal successors, (517), 215 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 517 transitions. [2021-06-05 22:25:43,937 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 517 transitions. Word has length 19 [2021-06-05 22:25:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:43,937 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 517 transitions. [2021-06-05 22:25:43,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:43,937 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 517 transitions. [2021-06-05 22:25:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:43,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:43,937 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:44,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16486 [2021-06-05 22:25:44,138 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2058457927, now seen corresponding path program 630 times [2021-06-05 22:25:44,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:44,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523568606] [2021-06-05 22:25:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:44,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:44,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523568606] [2021-06-05 22:25:44,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523568606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:44,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153302408] [2021-06-05 22:25:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:44,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:25:44,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:44,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:44,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:44,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:44,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:44,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:44,440 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:25:44,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:44,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:44,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:44,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:44,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-06-05 22:25:44,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:44,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153302408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749899769] [2021-06-05 22:25:44,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:44,541 INFO L87 Difference]: Start difference. First operand 216 states and 517 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:45,481 INFO L93 Difference]: Finished difference Result 346 states and 741 transitions. [2021-06-05 22:25:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:25:45,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:45,481 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:25:45,481 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 22:25:45,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:25:45,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 22:25:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 214. [2021-06-05 22:25:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 22:25:45,484 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 22:25:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:45,484 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 22:25:45,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 22:25:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:45,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:45,484 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:45,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16494,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:45,685 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash -788941926, now seen corresponding path program 631 times [2021-06-05 22:25:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179384921] [2021-06-05 22:25:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:45,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179384921] [2021-06-05 22:25:45,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179384921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791357439] [2021-06-05 22:25:45,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:45,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:45,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:45,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:45,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:45,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:45,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:45,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:45,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:45,945 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:45,945 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:45,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:45,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:45,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791357439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:45,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:45,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:45,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734042405] [2021-06-05 22:25:45,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:45,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:45,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:45,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:45,970 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:46,323 INFO L93 Difference]: Finished difference Result 344 states and 758 transitions. [2021-06-05 22:25:46,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:25:46,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:46,323 INFO L225 Difference]: With dead ends: 344 [2021-06-05 22:25:46,324 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:25:46,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:25:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:25:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2021-06-05 22:25:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 22:25:46,326 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 22:25:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:46,326 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 22:25:46,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:46,326 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 22:25:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:46,326 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:46,326 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:46,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16514,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:46,527 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:46,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1160798213, now seen corresponding path program 632 times [2021-06-05 22:25:46,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:46,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978064945] [2021-06-05 22:25:46,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:46,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978064945] [2021-06-05 22:25:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978064945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760319133] [2021-06-05 22:25:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:46,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:46,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:46,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:46,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:46,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:46,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:46,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:46,907 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:46,907 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:46,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:46,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:46,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:46,924 INFO L518 ElimStorePlain]: Eliminatee v_prenex_681 vanished before elimination [2021-06-05 22:25:46,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:46,925 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760319133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:46,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:46,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015026156] [2021-06-05 22:25:46,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:46,954 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:47,380 INFO L93 Difference]: Finished difference Result 270 states and 610 transitions. [2021-06-05 22:25:47,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:25:47,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:47,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:47,380 INFO L225 Difference]: With dead ends: 270 [2021-06-05 22:25:47,380 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 22:25:47,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:25:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 22:25:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-06-05 22:25:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.3719806763285023) internal successors, (491), 207 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 491 transitions. [2021-06-05 22:25:47,382 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 491 transitions. Word has length 19 [2021-06-05 22:25:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 491 transitions. [2021-06-05 22:25:47,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:47,383 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 491 transitions. [2021-06-05 22:25:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:47,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:47,383 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:47,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16518 [2021-06-05 22:25:47,583 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -625411968, now seen corresponding path program 633 times [2021-06-05 22:25:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072965205] [2021-06-05 22:25:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:47,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:47,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072965205] [2021-06-05 22:25:47,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072965205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:47,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418587587] [2021-06-05 22:25:47,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:47,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:47,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:47,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:47,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:47,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:47,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:47,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:47,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:47,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:47,850 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:47,850 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:47,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:47,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:47,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418587587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:47,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:47,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:47,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844967478] [2021-06-05 22:25:47,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:47,905 INFO L87 Difference]: Start difference. First operand 208 states and 491 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:48,945 INFO L93 Difference]: Finished difference Result 417 states and 905 transitions. [2021-06-05 22:25:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:25:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:48,946 INFO L225 Difference]: With dead ends: 417 [2021-06-05 22:25:48,946 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 22:25:48,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:25:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 22:25:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 217. [2021-06-05 22:25:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 22:25:48,949 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 22:25:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:48,949 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 22:25:48,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 22:25:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:48,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:48,949 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:49,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16545,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:49,150 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash -878567233, now seen corresponding path program 634 times [2021-06-05 22:25:49,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:49,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093247196] [2021-06-05 22:25:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:49,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:49,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093247196] [2021-06-05 22:25:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093247196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:49,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918550549] [2021-06-05 22:25:49,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:49,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:49,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:49,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:49,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:49,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:49,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:49,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:49,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:49,482 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:25:49,482 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:49,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:49,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:49,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:49,500 INFO L518 ElimStorePlain]: Eliminatee v_prenex_685 vanished before elimination [2021-06-05 22:25:49,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:49,501 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:49,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918550549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:49,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:49,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:49,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144477672] [2021-06-05 22:25:49,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:49,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:49,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:49,559 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:50,018 INFO L93 Difference]: Finished difference Result 345 states and 755 transitions. [2021-06-05 22:25:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:25:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:50,019 INFO L225 Difference]: With dead ends: 345 [2021-06-05 22:25:50,019 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:25:50,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:25:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:25:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2021-06-05 22:25:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 22:25:50,021 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 22:25:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:50,021 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 22:25:50,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 22:25:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:50,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:50,022 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:50,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16555 [2021-06-05 22:25:50,222 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:50,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1325904956, now seen corresponding path program 635 times [2021-06-05 22:25:50,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:50,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100722059] [2021-06-05 22:25:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:50,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:50,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100722059] [2021-06-05 22:25:50,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100722059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:50,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387977774] [2021-06-05 22:25:50,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:50,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:25:50,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:50,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:50,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:50,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:50,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:50,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:50,491 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:25:50,492 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:50,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:50,492 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:25:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:50,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387977774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:50,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:50,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:50,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430914850] [2021-06-05 22:25:50,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:50,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:50,538 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:51,349 INFO L93 Difference]: Finished difference Result 448 states and 964 transitions. [2021-06-05 22:25:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:25:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:51,349 INFO L225 Difference]: With dead ends: 448 [2021-06-05 22:25:51,349 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 22:25:51,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 765.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:25:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 22:25:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 215. [2021-06-05 22:25:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.4018691588785046) internal successors, (514), 214 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 514 transitions. [2021-06-05 22:25:51,352 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 514 transitions. Word has length 19 [2021-06-05 22:25:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:51,352 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 514 transitions. [2021-06-05 22:25:51,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 514 transitions. [2021-06-05 22:25:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:51,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:51,353 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:51,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16572,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:51,553 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 986265095, now seen corresponding path program 636 times [2021-06-05 22:25:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99823470] [2021-06-05 22:25:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:51,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:51,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99823470] [2021-06-05 22:25:51,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99823470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:51,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700766053] [2021-06-05 22:25:51,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:51,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:25:51,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:51,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:51,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:51,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:51,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:51,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:51,862 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:25:51,862 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:51,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:51,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:51,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:51,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-06-05 22:25:51,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:51,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:25:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:51,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700766053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:51,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:51,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:51,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385427399] [2021-06-05 22:25:51,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:51,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:51,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:51,960 INFO L87 Difference]: Start difference. First operand 215 states and 514 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:52,667 INFO L93 Difference]: Finished difference Result 336 states and 733 transitions. [2021-06-05 22:25:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:25:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:52,667 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:25:52,667 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 22:25:52,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:25:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 22:25:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 214. [2021-06-05 22:25:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 22:25:52,670 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 22:25:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:52,670 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 22:25:52,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 22:25:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:52,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:52,670 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:52,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16580 [2021-06-05 22:25:52,871 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:52,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1861134758, now seen corresponding path program 637 times [2021-06-05 22:25:52,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:52,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681055025] [2021-06-05 22:25:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:52,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681055025] [2021-06-05 22:25:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681055025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:52,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129956547] [2021-06-05 22:25:52,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:53,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:53,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:53,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:53,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:53,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:53,149 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:53,149 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:53,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:53,155 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:53,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129956547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:53,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:53,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:53,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225001133] [2021-06-05 22:25:53,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:53,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:53,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:53,179 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:53,687 INFO L93 Difference]: Finished difference Result 389 states and 858 transitions. [2021-06-05 22:25:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:25:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:53,688 INFO L225 Difference]: With dead ends: 389 [2021-06-05 22:25:53,688 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 22:25:53,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:25:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 22:25:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 214. [2021-06-05 22:25:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3943661971830985) internal successors, (510), 213 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 510 transitions. [2021-06-05 22:25:53,690 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 510 transitions. Word has length 19 [2021-06-05 22:25:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:53,690 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 510 transitions. [2021-06-05 22:25:53,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 510 transitions. [2021-06-05 22:25:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:53,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:53,691 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:53,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16594 [2021-06-05 22:25:53,891 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:53,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:53,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2061976251, now seen corresponding path program 638 times [2021-06-05 22:25:53,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:53,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164764773] [2021-06-05 22:25:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:53,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:53,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164764773] [2021-06-05 22:25:53,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164764773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:53,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557103596] [2021-06-05 22:25:53,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:53,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:53,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:53,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:54,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:54,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:54,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:54,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:54,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:54,297 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:54,298 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:54,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:54,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:54,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:54,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_694 vanished before elimination [2021-06-05 22:25:54,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:54,316 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:54,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557103596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:54,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:54,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:54,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484667997] [2021-06-05 22:25:54,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:54,345 INFO L87 Difference]: Start difference. First operand 214 states and 510 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:54,704 INFO L93 Difference]: Finished difference Result 278 states and 628 transitions. [2021-06-05 22:25:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:25:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:54,705 INFO L225 Difference]: With dead ends: 278 [2021-06-05 22:25:54,705 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 22:25:54,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:25:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 22:25:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2021-06-05 22:25:54,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-06-05 22:25:54,707 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 19 [2021-06-05 22:25:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:54,707 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-06-05 22:25:54,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-06-05 22:25:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:54,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:54,708 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:54,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16598 [2021-06-05 22:25:54,908 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1273389436, now seen corresponding path program 639 times [2021-06-05 22:25:54,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:54,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245098720] [2021-06-05 22:25:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:54,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245098720] [2021-06-05 22:25:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245098720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225789371] [2021-06-05 22:25:54,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:55,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:25:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:55,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:55,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:55,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:55,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:55,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:55,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:55,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:55,185 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:25:55,186 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:55,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:55,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:25:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:55,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225789371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:55,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:55,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:55,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937038290] [2021-06-05 22:25:55,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:55,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:55,211 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:55,456 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2021-06-05 22:25:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:25:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:55,457 INFO L225 Difference]: With dead ends: 330 [2021-06-05 22:25:55,457 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 22:25:55,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:25:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 22:25:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 211. [2021-06-05 22:25:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.376190476190476) internal successors, (499), 210 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 499 transitions. [2021-06-05 22:25:55,459 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 499 transitions. Word has length 19 [2021-06-05 22:25:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:55,459 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 499 transitions. [2021-06-05 22:25:55,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 499 transitions. [2021-06-05 22:25:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:55,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:55,459 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:55,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16614 [2021-06-05 22:25:55,660 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1049283719, now seen corresponding path program 640 times [2021-06-05 22:25:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:55,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71744097] [2021-06-05 22:25:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:55,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71744097] [2021-06-05 22:25:55,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71744097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:55,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462315688] [2021-06-05 22:25:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:55,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:25:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:56,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:25:56,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:56,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,094 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:25:56,094 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:56,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:56,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:25:56,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-06-05 22:25:56,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:25:56,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:25:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462315688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:56,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:56,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154016851] [2021-06-05 22:25:56,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:56,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:56,142 INFO L87 Difference]: Start difference. First operand 211 states and 499 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:56,401 INFO L93 Difference]: Finished difference Result 268 states and 604 transitions. [2021-06-05 22:25:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:25:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:56,402 INFO L225 Difference]: With dead ends: 268 [2021-06-05 22:25:56,402 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 22:25:56,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:25:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 22:25:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-06-05 22:25:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 22:25:56,404 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 22:25:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:56,405 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 22:25:56,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 22:25:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:56,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:56,405 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:56,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16618,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:56,605 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:56,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1963363643, now seen corresponding path program 641 times [2021-06-05 22:25:56,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:56,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282456319] [2021-06-05 22:25:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:56,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:56,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282456319] [2021-06-05 22:25:56,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282456319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:56,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034834703] [2021-06-05 22:25:56,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:56,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:25:56,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:56,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:56,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:56,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:56,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:56,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,852 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:25:56,853 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:56,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:25:56,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:25:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:56,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034834703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:56,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:56,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:56,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417119265] [2021-06-05 22:25:56,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:56,876 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:57,258 INFO L93 Difference]: Finished difference Result 437 states and 918 transitions. [2021-06-05 22:25:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:25:57,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:57,258 INFO L225 Difference]: With dead ends: 437 [2021-06-05 22:25:57,258 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 22:25:57,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:25:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 22:25:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 211. [2021-06-05 22:25:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 22:25:57,261 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 22:25:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:57,261 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 22:25:57,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:57,261 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 22:25:57,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:57,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:57,261 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:57,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16644,645 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:57,462 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:57,462 INFO L82 PathProgramCache]: Analyzing trace with hash 980796118, now seen corresponding path program 642 times [2021-06-05 22:25:57,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:57,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458458148] [2021-06-05 22:25:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:57,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458458148] [2021-06-05 22:25:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458458148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359675305] [2021-06-05 22:25:57,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:57,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:25:57,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:57,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:57,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:57,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:57,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:57,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:57,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:57,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:57,739 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:25:57,739 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:57,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:57,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:25:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359675305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:57,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:57,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71997739] [2021-06-05 22:25:57,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:57,793 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:58,527 INFO L93 Difference]: Finished difference Result 425 states and 880 transitions. [2021-06-05 22:25:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:25:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:58,527 INFO L225 Difference]: With dead ends: 425 [2021-06-05 22:25:58,527 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 22:25:58,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:25:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 22:25:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 213. [2021-06-05 22:25:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 22:25:58,530 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 22:25:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:58,530 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 22:25:58,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 22:25:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:58,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:58,531 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:58,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16648,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:58,731 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash 727640853, now seen corresponding path program 643 times [2021-06-05 22:25:58,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:58,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762546751] [2021-06-05 22:25:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:58,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:58,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762546751] [2021-06-05 22:25:58,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762546751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:58,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822232220] [2021-06-05 22:25:58,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:58,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:25:58,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:58,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:58,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:58,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:58,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:58,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:58,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:25:58,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:58,991 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:25:58,991 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:58,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:58,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:25:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:59,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822232220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:59,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:59,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659325158] [2021-06-05 22:25:59,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:59,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:59,038 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:59,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:25:59,460 INFO L93 Difference]: Finished difference Result 491 states and 1021 transitions. [2021-06-05 22:25:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:25:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:25:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:25:59,461 INFO L225 Difference]: With dead ends: 491 [2021-06-05 22:25:59,461 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 22:25:59,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:25:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 22:25:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 213. [2021-06-05 22:25:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 22:25:59,463 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 22:25:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:25:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 22:25:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:25:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 22:25:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:25:59,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:25:59,464 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:25:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16666,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:59,664 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:25:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:25:59,664 INFO L82 PathProgramCache]: Analyzing trace with hash 280303130, now seen corresponding path program 644 times [2021-06-05 22:25:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:25:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329257053] [2021-06-05 22:25:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:25:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:25:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:59,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:25:59,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329257053] [2021-06-05 22:25:59,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329257053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:59,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55173878] [2021-06-05 22:25:59,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:25:59,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:25:59,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:25:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:25:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:25:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:25:59,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:59,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:25:59,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:25:59,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:25:59,931 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:25:59,931 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:25:59,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:25:59,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:25:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:25:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55173878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:25:59,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:25:59,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:25:59,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487818654] [2021-06-05 22:25:59,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:25:59,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:25:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:25:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:25:59,978 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:00,394 INFO L93 Difference]: Finished difference Result 397 states and 841 transitions. [2021-06-05 22:26:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:26:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:00,395 INFO L225 Difference]: With dead ends: 397 [2021-06-05 22:26:00,395 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 22:26:00,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:26:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 22:26:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 212. [2021-06-05 22:26:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.374407582938389) internal successors, (501), 211 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 501 transitions. [2021-06-05 22:26:00,397 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 501 transitions. Word has length 19 [2021-06-05 22:26:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:00,398 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 501 transitions. [2021-06-05 22:26:00,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 501 transitions. [2021-06-05 22:26:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:00,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:00,398 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:00,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16676 [2021-06-05 22:26:00,598 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:00,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:00,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1702494115, now seen corresponding path program 645 times [2021-06-05 22:26:00,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:00,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556572443] [2021-06-05 22:26:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:00,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556572443] [2021-06-05 22:26:00,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556572443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:00,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368306537] [2021-06-05 22:26:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:00,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:00,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:00,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:00,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:00,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:00,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:00,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:00,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:00,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:00,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:00,852 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:26:00,853 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:00,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:00,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:26:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:00,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368306537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:00,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:00,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:00,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320654302] [2021-06-05 22:26:00,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:00,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:00,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:00,921 INFO L87 Difference]: Start difference. First operand 212 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:01,615 INFO L93 Difference]: Finished difference Result 488 states and 999 transitions. [2021-06-05 22:26:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:26:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:01,615 INFO L225 Difference]: With dead ends: 488 [2021-06-05 22:26:01,615 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 22:26:01,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:26:01,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 22:26:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 210. [2021-06-05 22:26:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.373205741626794) internal successors, (496), 209 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 496 transitions. [2021-06-05 22:26:01,618 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 496 transitions. Word has length 19 [2021-06-05 22:26:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:01,618 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 496 transitions. [2021-06-05 22:26:01,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 496 transitions. [2021-06-05 22:26:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:01,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:01,619 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:01,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16687 [2021-06-05 22:26:01,819 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1568541440, now seen corresponding path program 646 times [2021-06-05 22:26:01,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:01,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568281271] [2021-06-05 22:26:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:01,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568281271] [2021-06-05 22:26:01,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568281271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:01,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388311954] [2021-06-05 22:26:01,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:01,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:01,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:02,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:02,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:02,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:02,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:02,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:02,071 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:02,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:02,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:02,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388311954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:02,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:02,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508531788] [2021-06-05 22:26:02,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:02,125 INFO L87 Difference]: Start difference. First operand 210 states and 496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:04,476 INFO L93 Difference]: Finished difference Result 698 states and 1341 transitions. [2021-06-05 22:26:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 22:26:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:04,477 INFO L225 Difference]: With dead ends: 698 [2021-06-05 22:26:04,477 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 22:26:04,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 2070.3ms TimeCoverageRelationStatistics Valid=651, Invalid=5511, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:26:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 22:26:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 221. [2021-06-05 22:26:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 22:26:04,480 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 22:26:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:04,480 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 22:26:04,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 22:26:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:04,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:04,480 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:04,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16700,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:04,681 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1315386175, now seen corresponding path program 647 times [2021-06-05 22:26:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512612573] [2021-06-05 22:26:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:04,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512612573] [2021-06-05 22:26:04,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512612573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:04,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078219201] [2021-06-05 22:26:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:04,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:04,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:04,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:04,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:04,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:04,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:04,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:04,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:04,989 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:26:04,989 INFO L518 ElimStorePlain]: Eliminatee v_prenex_702 vanished before elimination [2021-06-05 22:26:04,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:04,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:05,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:05,009 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:05,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:05,010 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:05,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078219201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650154810] [2021-06-05 22:26:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:05,066 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:05,628 INFO L93 Difference]: Finished difference Result 445 states and 934 transitions. [2021-06-05 22:26:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:26:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:05,629 INFO L225 Difference]: With dead ends: 445 [2021-06-05 22:26:05,629 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 22:26:05,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:26:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 22:26:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 221. [2021-06-05 22:26:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 22:26:05,632 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 22:26:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:05,632 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 22:26:05,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 22:26:05,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:05,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:05,632 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:05,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16710,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:05,833 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:05,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash 868048452, now seen corresponding path program 648 times [2021-06-05 22:26:05,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:05,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044377692] [2021-06-05 22:26:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:05,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044377692] [2021-06-05 22:26:05,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044377692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111499433] [2021-06-05 22:26:05,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:05,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:06,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:06,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:06,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:06,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:06,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:06,087 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:06,087 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:06,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:06,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:06,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111499433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:06,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:06,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:06,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316076834] [2021-06-05 22:26:06,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:06,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:06,133 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:07,433 INFO L93 Difference]: Finished difference Result 585 states and 1189 transitions. [2021-06-05 22:26:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:26:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:07,434 INFO L225 Difference]: With dead ends: 585 [2021-06-05 22:26:07,434 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 22:26:07,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1200.0ms TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:26:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 22:26:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 217. [2021-06-05 22:26:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.412037037037037) internal successors, (521), 216 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 521 transitions. [2021-06-05 22:26:07,437 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 521 transitions. Word has length 19 [2021-06-05 22:26:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:07,437 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 521 transitions. [2021-06-05 22:26:07,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:07,437 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 521 transitions. [2021-06-05 22:26:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:07,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:07,437 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:07,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16727 [2021-06-05 22:26:07,638 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:07,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1114748793, now seen corresponding path program 649 times [2021-06-05 22:26:07,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:07,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849181505] [2021-06-05 22:26:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:07,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849181505] [2021-06-05 22:26:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849181505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728750565] [2021-06-05 22:26:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:07,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:07,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:07,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:07,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:07,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:07,941 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:26:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:07,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:07,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:07,959 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:07,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_706 vanished before elimination [2021-06-05 22:26:07,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:07,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728750565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:08,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:08,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729694981] [2021-06-05 22:26:08,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:08,039 INFO L87 Difference]: Start difference. First operand 217 states and 521 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:08,924 INFO L93 Difference]: Finished difference Result 457 states and 934 transitions. [2021-06-05 22:26:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:26:08,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:08,925 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:26:08,925 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 22:26:08,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:26:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 22:26:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 216. [2021-06-05 22:26:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4093023255813955) internal successors, (518), 215 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 518 transitions. [2021-06-05 22:26:08,927 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 518 transitions. Word has length 19 [2021-06-05 22:26:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:08,927 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 518 transitions. [2021-06-05 22:26:08,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 518 transitions. [2021-06-05 22:26:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:08,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:08,928 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:09,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16735,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:09,128 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 332818650, now seen corresponding path program 650 times [2021-06-05 22:26:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:09,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248604924] [2021-06-05 22:26:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:09,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:09,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248604924] [2021-06-05 22:26:09,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248604924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:09,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058251030] [2021-06-05 22:26:09,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:09,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:09,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:09,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:09,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:09,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:09,388 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:09,388 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:09,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:09,389 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058251030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:09,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:09,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948009051] [2021-06-05 22:26:09,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:09,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:09,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:09,413 INFO L87 Difference]: Start difference. First operand 216 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:09,916 INFO L93 Difference]: Finished difference Result 465 states and 973 transitions. [2021-06-05 22:26:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:26:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:09,917 INFO L225 Difference]: With dead ends: 465 [2021-06-05 22:26:09,917 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 22:26:09,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:26:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 22:26:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 211. [2021-06-05 22:26:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 22:26:09,920 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 22:26:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:09,920 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 22:26:09,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 22:26:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:09,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:09,920 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:10,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16755,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:10,121 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:10,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:10,121 INFO L82 PathProgramCache]: Analyzing trace with hash -39037637, now seen corresponding path program 651 times [2021-06-05 22:26:10,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:10,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224258853] [2021-06-05 22:26:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:10,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224258853] [2021-06-05 22:26:10,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224258853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134641265] [2021-06-05 22:26:10,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:10,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:10,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:10,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:10,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:10,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:10,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:10,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:10,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:10,538 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:10,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:10,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:10,555 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:10,555 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-05 22:26:10,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:10,556 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:10,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134641265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:10,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:10,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:10,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247142408] [2021-06-05 22:26:10,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:10,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:10,586 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:11,160 INFO L93 Difference]: Finished difference Result 353 states and 752 transitions. [2021-06-05 22:26:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:26:11,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:11,161 INFO L225 Difference]: With dead ends: 353 [2021-06-05 22:26:11,161 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:26:11,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:26:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:26:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 210. [2021-06-05 22:26:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 22:26:11,164 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 22:26:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:11,164 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 22:26:11,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 22:26:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:11,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:11,164 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:11,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16759,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:11,365 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1686190058, now seen corresponding path program 652 times [2021-06-05 22:26:11,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:11,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50493435] [2021-06-05 22:26:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:11,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:11,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50493435] [2021-06-05 22:26:11,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50493435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:11,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741173822] [2021-06-05 22:26:11,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:11,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:11,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:11,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:11,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:11,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:11,638 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:11,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:11,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:11,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741173822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:11,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:11,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778179445] [2021-06-05 22:26:11,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:11,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:11,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:11,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:11,694 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:13,879 INFO L93 Difference]: Finished difference Result 483 states and 983 transitions. [2021-06-05 22:26:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:26:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:13,880 INFO L225 Difference]: With dead ends: 483 [2021-06-05 22:26:13,880 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 22:26:13,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2048.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:26:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 22:26:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 219. [2021-06-05 22:26:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 22:26:13,883 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 22:26:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:13,883 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 22:26:13,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:13,883 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 22:26:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:13,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:13,883 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:14,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16775 [2021-06-05 22:26:14,084 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1939345323, now seen corresponding path program 653 times [2021-06-05 22:26:14,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:14,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577665046] [2021-06-05 22:26:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:14,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577665046] [2021-06-05 22:26:14,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577665046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:14,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171836337] [2021-06-05 22:26:14,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:14,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:14,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:14,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:14,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:14,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:14,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:14,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:14,395 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:26:14,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:14,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:14,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:14,413 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-06-05 22:26:14,413 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:14,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:14,414 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:14,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171836337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:14,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:14,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:14,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759542266] [2021-06-05 22:26:14,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:14,471 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:14,847 INFO L93 Difference]: Finished difference Result 336 states and 723 transitions. [2021-06-05 22:26:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:26:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:14,848 INFO L225 Difference]: With dead ends: 336 [2021-06-05 22:26:14,848 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 22:26:14,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:26:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 22:26:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 219. [2021-06-05 22:26:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 22:26:14,850 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 22:26:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:14,850 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 22:26:14,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 22:26:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:14,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:14,851 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:15,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16785 [2021-06-05 22:26:15,051 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1908284250, now seen corresponding path program 654 times [2021-06-05 22:26:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:15,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317730834] [2021-06-05 22:26:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:15,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:15,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317730834] [2021-06-05 22:26:15,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317730834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:15,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032312920] [2021-06-05 22:26:15,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:15,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:15,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:15,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:15,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:15,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:15,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:15,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:15,325 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:15,325 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:15,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:15,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:15,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032312920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:15,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:15,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:15,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481590691] [2021-06-05 22:26:15,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:15,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:15,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:15,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:15,372 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:16,547 INFO L93 Difference]: Finished difference Result 440 states and 916 transitions. [2021-06-05 22:26:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:26:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:16,548 INFO L225 Difference]: With dead ends: 440 [2021-06-05 22:26:16,548 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 22:26:16,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1136.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:26:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 22:26:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 211. [2021-06-05 22:26:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 22:26:16,551 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 22:26:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:16,551 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 22:26:16,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:16,551 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 22:26:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:16,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:16,551 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:16,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16796 [2021-06-05 22:26:16,752 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash -74512995, now seen corresponding path program 655 times [2021-06-05 22:26:16,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:16,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960084919] [2021-06-05 22:26:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:16,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:16,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960084919] [2021-06-05 22:26:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960084919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:16,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478460264] [2021-06-05 22:26:16,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:17,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:17,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:17,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:17,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:17,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:17,118 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:26:17,118 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:17,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:17,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:17,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:17,137 INFO L518 ElimStorePlain]: Eliminatee v_prenex_718 vanished before elimination [2021-06-05 22:26:17,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:17,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:17,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478460264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:17,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:17,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:17,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585039329] [2021-06-05 22:26:17,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:17,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:17,218 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:17,898 INFO L93 Difference]: Finished difference Result 307 states and 660 transitions. [2021-06-05 22:26:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:26:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:17,898 INFO L225 Difference]: With dead ends: 307 [2021-06-05 22:26:17,898 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:26:17,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:26:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:26:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 210. [2021-06-05 22:26:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:17,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 22:26:17,901 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 22:26:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:17,901 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 22:26:17,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 22:26:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:17,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:17,901 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:18,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16804 [2021-06-05 22:26:18,102 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1373054448, now seen corresponding path program 656 times [2021-06-05 22:26:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:18,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032536405] [2021-06-05 22:26:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:18,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:18,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032536405] [2021-06-05 22:26:18,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032536405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:18,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870147861] [2021-06-05 22:26:18,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:18,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:18,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:18,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:18,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:18,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:18,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:18,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:18,375 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:18,375 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:18,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:18,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:18,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870147861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:18,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:18,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:18,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98453446] [2021-06-05 22:26:18,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:18,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:18,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:18,400 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:19,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:19,357 INFO L93 Difference]: Finished difference Result 327 states and 718 transitions. [2021-06-05 22:26:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:26:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:19,358 INFO L225 Difference]: With dead ends: 327 [2021-06-05 22:26:19,358 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 22:26:19,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 910.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:26:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 22:26:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 204. [2021-06-05 22:26:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.3596059113300494) internal successors, (479), 203 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 479 transitions. [2021-06-05 22:26:19,360 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 479 transitions. Word has length 19 [2021-06-05 22:26:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:19,360 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 479 transitions. [2021-06-05 22:26:19,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 479 transitions. [2021-06-05 22:26:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:19,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:19,360 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:19,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16824,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:19,561 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:19,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:19,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1960799770, now seen corresponding path program 657 times [2021-06-05 22:26:19,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:19,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139891134] [2021-06-05 22:26:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:19,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:19,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139891134] [2021-06-05 22:26:19,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139891134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:19,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476813392] [2021-06-05 22:26:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:19,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:26:19,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:19,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:19,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:19,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:19,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:19,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:19,827 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:19,828 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:19,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:19,828 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:19,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476813392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:19,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:19,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:19,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206203420] [2021-06-05 22:26:19,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:19,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:19,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:19,852 INFO L87 Difference]: Start difference. First operand 204 states and 479 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:20,134 INFO L93 Difference]: Finished difference Result 296 states and 653 transitions. [2021-06-05 22:26:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:26:20,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:20,134 INFO L225 Difference]: With dead ends: 296 [2021-06-05 22:26:20,134 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 22:26:20,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:26:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 22:26:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 22:26:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3451776649746194) internal successors, (462), 197 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 462 transitions. [2021-06-05 22:26:20,136 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 462 transitions. Word has length 19 [2021-06-05 22:26:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:20,137 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 462 transitions. [2021-06-05 22:26:20,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 462 transitions. [2021-06-05 22:26:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:20,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:20,137 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:20,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16828,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:20,337 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash -11494371, now seen corresponding path program 658 times [2021-06-05 22:26:20,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:20,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730583086] [2021-06-05 22:26:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:26:20,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:20,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730583086] [2021-06-05 22:26:20,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730583086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:20,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046993130] [2021-06-05 22:26:20,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:20,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:20,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:20,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:20,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:20,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:20,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:20,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:20,816 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:20,817 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:20,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:20,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:20,836 INFO L518 ElimStorePlain]: Eliminatee v_prenex_722 vanished before elimination [2021-06-05 22:26:20,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:20,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046993130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:20,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:20,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 22:26:20,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940719826] [2021-06-05 22:26:20,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:20,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:20,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:20,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:20,870 INFO L87 Difference]: Start difference. First operand 198 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:21,354 INFO L93 Difference]: Finished difference Result 246 states and 547 transitions. [2021-06-05 22:26:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:26:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:21,355 INFO L225 Difference]: With dead ends: 246 [2021-06-05 22:26:21,355 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 22:26:21,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:26:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 22:26:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 198. [2021-06-05 22:26:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 22:26:21,357 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 19 [2021-06-05 22:26:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:21,357 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 22:26:21,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 22:26:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:21,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:21,357 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:21,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16832,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:21,558 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 496348608, now seen corresponding path program 659 times [2021-06-05 22:26:21,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:21,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29638621] [2021-06-05 22:26:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:21,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:21,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29638621] [2021-06-05 22:26:21,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29638621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:21,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282056635] [2021-06-05 22:26:21,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:21,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:26:21,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:21,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:21,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:21,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:21,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:21,860 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:21,860 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:21,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:21,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:21,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282056635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:21,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:21,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:21,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185242938] [2021-06-05 22:26:21,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:21,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:21,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:21,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:21,918 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:23,208 INFO L93 Difference]: Finished difference Result 329 states and 702 transitions. [2021-06-05 22:26:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:26:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:23,209 INFO L225 Difference]: With dead ends: 329 [2021-06-05 22:26:23,209 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 22:26:23,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1215.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:26:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 22:26:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 206. [2021-06-05 22:26:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 22:26:23,211 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 22:26:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:23,211 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 22:26:23,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 22:26:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:23,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:23,211 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:23,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16859,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:23,412 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:23,412 INFO L82 PathProgramCache]: Analyzing trace with hash 243193343, now seen corresponding path program 660 times [2021-06-05 22:26:23,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:23,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157585566] [2021-06-05 22:26:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:23,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157585566] [2021-06-05 22:26:23,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157585566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149647664] [2021-06-05 22:26:23,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:23,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:23,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:23,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:23,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:23,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:23,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:23,812 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:26:23,812 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-06-05 22:26:23,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:23,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:23,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:23,830 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:23,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:23,831 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:23,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149647664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:23,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:23,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:23,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089796734] [2021-06-05 22:26:23,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:23,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:23,891 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:24,255 INFO L93 Difference]: Finished difference Result 311 states and 665 transitions. [2021-06-05 22:26:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:26:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:24,255 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:26:24,255 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 22:26:24,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:26:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 22:26:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 206. [2021-06-05 22:26:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 22:26:24,258 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 22:26:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:24,258 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 22:26:24,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 22:26:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:24,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:24,258 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16869 [2021-06-05 22:26:24,459 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -204144380, now seen corresponding path program 661 times [2021-06-05 22:26:24,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:24,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718373937] [2021-06-05 22:26:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:24,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:24,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718373937] [2021-06-05 22:26:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718373937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:24,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372525153] [2021-06-05 22:26:24,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:24,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:24,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:24,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:24,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:24,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:24,761 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:24,761 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:24,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:24,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:24,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372525153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:24,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:24,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409910788] [2021-06-05 22:26:24,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:24,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:24,891 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:25,956 INFO L93 Difference]: Finished difference Result 338 states and 726 transitions. [2021-06-05 22:26:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:26:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:25,956 INFO L225 Difference]: With dead ends: 338 [2021-06-05 22:26:25,956 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 22:26:25,957 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1043.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:26:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 22:26:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 206. [2021-06-05 22:26:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 22:26:25,959 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 22:26:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:25,959 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 22:26:25,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 22:26:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:25,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:25,959 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:26,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16886,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:26,160 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2108025671, now seen corresponding path program 662 times [2021-06-05 22:26:26,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:26,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422947252] [2021-06-05 22:26:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:26,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422947252] [2021-06-05 22:26:26,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422947252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:26,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122213029] [2021-06-05 22:26:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:26,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:26,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:26,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:26,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:26,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:26,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:26,526 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:26:26,526 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:26,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:26,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:26,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:26,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_728 vanished before elimination [2021-06-05 22:26:26,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:26,545 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:26,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122213029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:26,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:26,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:26,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149378936] [2021-06-05 22:26:26,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:26,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:26,627 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:27,242 INFO L93 Difference]: Finished difference Result 315 states and 667 transitions. [2021-06-05 22:26:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:26:27,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:27,243 INFO L225 Difference]: With dead ends: 315 [2021-06-05 22:26:27,243 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 22:26:27,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:26:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 22:26:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 22:26:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 22:26:27,245 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 22:26:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:27,245 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 22:26:27,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 22:26:27,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:27,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:27,246 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:27,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16894 [2021-06-05 22:26:27,446 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:27,446 INFO L82 PathProgramCache]: Analyzing trace with hash -739374182, now seen corresponding path program 663 times [2021-06-05 22:26:27,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:27,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131570122] [2021-06-05 22:26:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:27,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:27,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131570122] [2021-06-05 22:26:27,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131570122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:27,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339785310] [2021-06-05 22:26:27,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:27,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:26:27,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:27,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:27,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:27,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:27,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:27,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:27,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:27,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:27,765 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:27,765 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:27,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:27,766 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:27,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339785310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:27,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:27,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:27,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827303652] [2021-06-05 22:26:27,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:27,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:27,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:27,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:27,791 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:28,773 INFO L93 Difference]: Finished difference Result 311 states and 685 transitions. [2021-06-05 22:26:28,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:26:28,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:28,774 INFO L225 Difference]: With dead ends: 311 [2021-06-05 22:26:28,774 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 22:26:28,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:26:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 22:26:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 22:26:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 22:26:28,776 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 22:26:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:28,776 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 22:26:28,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 22:26:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:28,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:28,777 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:28,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16914,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:28,977 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1111230469, now seen corresponding path program 664 times [2021-06-05 22:26:28,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:28,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434643393] [2021-06-05 22:26:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:29,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434643393] [2021-06-05 22:26:29,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434643393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:29,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033684660] [2021-06-05 22:26:29,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:29,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:29,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:29,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:29,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:29,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:29,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:29,440 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:29,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:29,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:29,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:29,458 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:29,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_733 vanished before elimination [2021-06-05 22:26:29,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:29,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:29,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033684660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:29,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:29,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:29,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781386503] [2021-06-05 22:26:29,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:29,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:29,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:29,491 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:29,969 INFO L93 Difference]: Finished difference Result 266 states and 588 transitions. [2021-06-05 22:26:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:26:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:29,970 INFO L225 Difference]: With dead ends: 266 [2021-06-05 22:26:29,970 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 22:26:29,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:26:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 22:26:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 201. [2021-06-05 22:26:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 22:26:29,972 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 22:26:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:29,972 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 22:26:29,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 22:26:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:29,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:29,972 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:30,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16918,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:30,173 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:30,173 INFO L82 PathProgramCache]: Analyzing trace with hash -151628860, now seen corresponding path program 665 times [2021-06-05 22:26:30,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:30,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076309571] [2021-06-05 22:26:30,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:30,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:30,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076309571] [2021-06-05 22:26:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076309571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:30,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329077284] [2021-06-05 22:26:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:30,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:26:30,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:30,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:30,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:30,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:30,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:30,479 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:30,479 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:30,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:30,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329077284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:30,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:30,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:30,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38219449] [2021-06-05 22:26:30,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:30,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:30,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:30,505 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:31,001 INFO L93 Difference]: Finished difference Result 287 states and 638 transitions. [2021-06-05 22:26:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:26:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:31,002 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:26:31,002 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:26:31,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:26:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:26:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 201. [2021-06-05 22:26:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 22:26:31,004 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 22:26:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:31,004 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 22:26:31,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 22:26:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:31,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:31,005 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:31,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16934 [2021-06-05 22:26:31,205 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2123923001, now seen corresponding path program 666 times [2021-06-05 22:26:31,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:31,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303942455] [2021-06-05 22:26:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:31,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303942455] [2021-06-05 22:26:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303942455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327382885] [2021-06-05 22:26:31,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:31,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:26:31,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:31,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:31,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:31,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:31,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:31,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:31,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:31,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:31,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:31,686 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:31,686 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:31,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:31,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:31,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:31,703 INFO L518 ElimStorePlain]: Eliminatee v_prenex_740 vanished before elimination [2021-06-05 22:26:31,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:31,704 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:31,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327382885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:31,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:31,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451348808] [2021-06-05 22:26:31,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:31,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:31,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:31,735 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:32,079 INFO L93 Difference]: Finished difference Result 255 states and 568 transitions. [2021-06-05 22:26:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:26:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:32,079 INFO L225 Difference]: With dead ends: 255 [2021-06-05 22:26:32,080 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 22:26:32,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:26:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 22:26:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 199. [2021-06-05 22:26:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.3535353535353534) internal successors, (466), 198 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 466 transitions. [2021-06-05 22:26:32,082 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 466 transitions. Word has length 19 [2021-06-05 22:26:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:32,082 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 466 transitions. [2021-06-05 22:26:32,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,082 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 466 transitions. [2021-06-05 22:26:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:32,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:32,082 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:32,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16938 [2021-06-05 22:26:32,282 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash 888606938, now seen corresponding path program 667 times [2021-06-05 22:26:32,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:32,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725321987] [2021-06-05 22:26:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:32,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:32,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725321987] [2021-06-05 22:26:32,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725321987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:32,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296031225] [2021-06-05 22:26:32,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:32,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:32,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:32,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:32,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:32,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:32,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:32,575 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:32,575 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:32,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:32,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296031225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:32,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:32,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:32,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683415463] [2021-06-05 22:26:32,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:32,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:32,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:32,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:32,600 INFO L87 Difference]: Start difference. First operand 199 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:32,850 INFO L93 Difference]: Finished difference Result 275 states and 611 transitions. [2021-06-05 22:26:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:26:32,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:32,850 INFO L225 Difference]: With dead ends: 275 [2021-06-05 22:26:32,850 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 22:26:32,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:26:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 22:26:32,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 195. [2021-06-05 22:26:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 22:26:32,853 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 22:26:32,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:32,853 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 22:26:32,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 22:26:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:32,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:32,854 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:33,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16964,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:33,069 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash 842346875, now seen corresponding path program 668 times [2021-06-05 22:26:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:33,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033715844] [2021-06-05 22:26:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:33,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:33,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033715844] [2021-06-05 22:26:33,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033715844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:33,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354100128] [2021-06-05 22:26:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:33,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:33,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:33,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:33,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:33,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:33,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:33,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:33,560 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:33,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-06-05 22:26:33,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:33,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:33,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:33,577 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:33,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:33,578 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354100128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:33,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:33,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 22:26:33,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72177646] [2021-06-05 22:26:33,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:26:33,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:26:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:26:33,609 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:33,853 INFO L93 Difference]: Finished difference Result 245 states and 541 transitions. [2021-06-05 22:26:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:26:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:33,854 INFO L225 Difference]: With dead ends: 245 [2021-06-05 22:26:33,854 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 22:26:33,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:26:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 22:26:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2021-06-05 22:26:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.328125) internal successors, (447), 192 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 447 transitions. [2021-06-05 22:26:33,856 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 447 transitions. Word has length 19 [2021-06-05 22:26:33,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:33,856 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 447 transitions. [2021-06-05 22:26:33,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:33,856 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 447 transitions. [2021-06-05 22:26:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:33,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:33,856 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:34,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16968,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:34,057 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash 146256554, now seen corresponding path program 669 times [2021-06-05 22:26:34,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:34,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906617926] [2021-06-05 22:26:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:34,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906617926] [2021-06-05 22:26:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906617926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840309423] [2021-06-05 22:26:34,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:34,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:26:34,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:34,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:34,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:34,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:34,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:34,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:34,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:34,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:34,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:34,357 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 22:26:34,357 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:34,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:34,358 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 22:26:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840309423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:34,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:34,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:34,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493767674] [2021-06-05 22:26:34,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:34,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:34,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:34,387 INFO L87 Difference]: Start difference. First operand 193 states and 447 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:34,829 INFO L93 Difference]: Finished difference Result 392 states and 810 transitions. [2021-06-05 22:26:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:26:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:34,830 INFO L225 Difference]: With dead ends: 392 [2021-06-05 22:26:34,830 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 22:26:34,830 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:26:34,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 22:26:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 193. [2021-06-05 22:26:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 22:26:34,832 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 22:26:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:34,833 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 22:26:34,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 22:26:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:34,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:34,833 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:35,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16994 [2021-06-05 22:26:35,033 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 888377931, now seen corresponding path program 670 times [2021-06-05 22:26:35,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:35,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96830220] [2021-06-05 22:26:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:35,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96830220] [2021-06-05 22:26:35,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96830220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247075181] [2021-06-05 22:26:35,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:35,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:35,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:35,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:35,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:35,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:35,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:35,276 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 22:26:35,276 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:35,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:35,277 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 22:26:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:35,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247075181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:35,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:35,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:35,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753302481] [2021-06-05 22:26:35,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:35,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:35,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:35,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:35,299 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:35,755 INFO L93 Difference]: Finished difference Result 471 states and 975 transitions. [2021-06-05 22:26:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:26:35,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:35,755 INFO L225 Difference]: With dead ends: 471 [2021-06-05 22:26:35,755 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 22:26:35,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:26:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 22:26:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 193. [2021-06-05 22:26:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 22:26:35,758 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 22:26:35,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:35,758 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 22:26:35,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:35,758 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 22:26:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:35,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:35,758 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17009,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:35,959 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash -94189594, now seen corresponding path program 671 times [2021-06-05 22:26:35,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:35,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082170507] [2021-06-05 22:26:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:36,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:36,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082170507] [2021-06-05 22:26:36,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082170507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:36,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212778101] [2021-06-05 22:26:36,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:36,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:26:36,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:36,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:36,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:36,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:36,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:36,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:36,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:36,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:36,231 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:26:36,231 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:36,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:36,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:26:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212778101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:36,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:36,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:36,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144901738] [2021-06-05 22:26:36,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:36,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:36,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:36,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:36,285 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:37,069 INFO L93 Difference]: Finished difference Result 455 states and 924 transitions. [2021-06-05 22:26:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:26:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:37,070 INFO L225 Difference]: With dead ends: 455 [2021-06-05 22:26:37,070 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 22:26:37,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:26:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 22:26:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-06-05 22:26:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 22:26:37,072 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 22:26:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:37,072 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 22:26:37,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 22:26:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:37,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:37,073 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:37,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17013,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:37,273 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -347344859, now seen corresponding path program 672 times [2021-06-05 22:26:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324423741] [2021-06-05 22:26:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:37,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324423741] [2021-06-05 22:26:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324423741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:37,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210509251] [2021-06-05 22:26:37,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:37,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:37,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:37,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:37,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:37,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:37,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:37,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:37,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:37,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:37,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:37,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:37,488 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:37,525 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 22:26:37,525 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:37,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:37,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:26:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:37,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210509251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:37,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:37,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445855598] [2021-06-05 22:26:37,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:37,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:37,572 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:38,064 INFO L93 Difference]: Finished difference Result 540 states and 1104 transitions. [2021-06-05 22:26:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:26:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:38,065 INFO L225 Difference]: With dead ends: 540 [2021-06-05 22:26:38,065 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 22:26:38,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:26:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 22:26:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 195. [2021-06-05 22:26:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 22:26:38,067 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 22:26:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:38,067 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 22:26:38,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 22:26:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:38,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:38,068 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:38,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17031 [2021-06-05 22:26:38,268 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -794682582, now seen corresponding path program 673 times [2021-06-05 22:26:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:38,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102013977] [2021-06-05 22:26:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:38,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102013977] [2021-06-05 22:26:38,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102013977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:38,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738503374] [2021-06-05 22:26:38,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:38,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:38,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:38,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:38,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:38,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:38,542 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 22:26:38,542 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:38,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:38,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 22:26:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738503374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:38,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:38,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:38,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803033428] [2021-06-05 22:26:38,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:38,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:38,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:38,588 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:39,140 INFO L93 Difference]: Finished difference Result 430 states and 891 transitions. [2021-06-05 22:26:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:26:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:39,141 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:26:39,141 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 22:26:39,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:26:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 22:26:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 194. [2021-06-05 22:26:39,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.326424870466321) internal successors, (449), 193 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 449 transitions. [2021-06-05 22:26:39,143 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 449 transitions. Word has length 19 [2021-06-05 22:26:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:39,143 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 449 transitions. [2021-06-05 22:26:39,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 449 transitions. [2021-06-05 22:26:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:39,144 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:39,144 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:39,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:39,344 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:39,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1517487469, now seen corresponding path program 674 times [2021-06-05 22:26:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:39,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60697685] [2021-06-05 22:26:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60697685] [2021-06-05 22:26:39,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60697685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:39,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481246269] [2021-06-05 22:26:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:39,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:39,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:39,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:39,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:39,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:39,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:39,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:39,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:39,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:39,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:39,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:39,597 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 22:26:39,597 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:39,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:39,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 22:26:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:39,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481246269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:39,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:39,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:39,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513794543] [2021-06-05 22:26:39,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:39,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:39,666 INFO L87 Difference]: Start difference. First operand 194 states and 449 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:40,469 INFO L93 Difference]: Finished difference Result 533 states and 1074 transitions. [2021-06-05 22:26:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:26:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:40,470 INFO L225 Difference]: With dead ends: 533 [2021-06-05 22:26:40,470 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:26:40,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:26:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:26:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 191. [2021-06-05 22:26:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3157894736842106) internal successors, (440), 190 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 440 transitions. [2021-06-05 22:26:40,473 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 440 transitions. Word has length 19 [2021-06-05 22:26:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:40,473 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 440 transitions. [2021-06-05 22:26:40,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 440 transitions. [2021-06-05 22:26:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:40,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:40,473 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:40,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17056 [2021-06-05 22:26:40,674 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash 493555728, now seen corresponding path program 675 times [2021-06-05 22:26:40,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:40,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319942384] [2021-06-05 22:26:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:40,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319942384] [2021-06-05 22:26:40,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319942384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509145265] [2021-06-05 22:26:40,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:40,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:26:40,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:40,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:40,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:40,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:40,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:40,932 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:40,932 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:40,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:40,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:40,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509145265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:40,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:40,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:40,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231641000] [2021-06-05 22:26:40,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:40,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:40,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:40,988 INFO L87 Difference]: Start difference. First operand 191 states and 440 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:43,379 INFO L93 Difference]: Finished difference Result 768 states and 1465 transitions. [2021-06-05 22:26:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 22:26:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:43,380 INFO L225 Difference]: With dead ends: 768 [2021-06-05 22:26:43,380 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 22:26:43,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2083.3ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:26:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 22:26:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 201. [2021-06-05 22:26:43,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 22:26:43,384 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 22:26:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:43,384 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 22:26:43,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 22:26:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:43,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:43,384 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:43,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17069 [2021-06-05 22:26:43,585 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash 240400463, now seen corresponding path program 676 times [2021-06-05 22:26:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:43,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051114219] [2021-06-05 22:26:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:43,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:43,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051114219] [2021-06-05 22:26:43,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051114219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733379087] [2021-06-05 22:26:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:43,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:43,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:43,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:43,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:43,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:43,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:43,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:43,879 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:26:43,879 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-05 22:26:43,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:43,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:43,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:43,897 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:43,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:43,898 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:43,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733379087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:43,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:43,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935984568] [2021-06-05 22:26:43,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:43,955 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:44,527 INFO L93 Difference]: Finished difference Result 479 states and 984 transitions. [2021-06-05 22:26:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:26:44,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:44,528 INFO L225 Difference]: With dead ends: 479 [2021-06-05 22:26:44,528 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 22:26:44,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:26:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 22:26:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 201. [2021-06-05 22:26:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 22:26:44,530 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 22:26:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:44,530 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 22:26:44,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:44,530 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 22:26:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:44,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:44,531 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:44,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17079 [2021-06-05 22:26:44,731 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash -206937260, now seen corresponding path program 677 times [2021-06-05 22:26:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:44,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396653015] [2021-06-05 22:26:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396653015] [2021-06-05 22:26:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396653015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472203562] [2021-06-05 22:26:44,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:44,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:44,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:44,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:44,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:44,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:44,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:44,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:44,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:44,987 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:44,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:44,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:44,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472203562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723372721] [2021-06-05 22:26:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:45,034 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:46,424 INFO L93 Difference]: Finished difference Result 661 states and 1325 transitions. [2021-06-05 22:26:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:26:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:46,425 INFO L225 Difference]: With dead ends: 661 [2021-06-05 22:26:46,425 INFO L226 Difference]: Without dead ends: 661 [2021-06-05 22:26:46,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1206.9ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:26:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-05 22:26:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 198. [2021-06-05 22:26:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3604060913705585) internal successors, (465), 197 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 465 transitions. [2021-06-05 22:26:46,428 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 465 transitions. Word has length 19 [2021-06-05 22:26:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:46,428 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 465 transitions. [2021-06-05 22:26:46,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 465 transitions. [2021-06-05 22:26:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:46,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:46,428 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:46,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17090,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,629 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 2105232791, now seen corresponding path program 678 times [2021-06-05 22:26:46,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:46,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807314959] [2021-06-05 22:26:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:46,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:46,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807314959] [2021-06-05 22:26:46,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807314959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:46,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794506426] [2021-06-05 22:26:46,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:46,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:26:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:46,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:46,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:46,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:46,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:46,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:46,903 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:46,951 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 22:26:46,951 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:46,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:46,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:46,969 INFO L518 ElimStorePlain]: Eliminatee v_prenex_751 vanished before elimination [2021-06-05 22:26:46,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:46,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:47,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794506426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:47,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:47,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:47,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435576345] [2021-06-05 22:26:47,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:47,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:47,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:47,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:47,050 INFO L87 Difference]: Start difference. First operand 198 states and 465 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:48,092 INFO L93 Difference]: Finished difference Result 497 states and 997 transitions. [2021-06-05 22:26:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:26:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:48,093 INFO L225 Difference]: With dead ends: 497 [2021-06-05 22:26:48,093 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 22:26:48,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:26:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 22:26:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 197. [2021-06-05 22:26:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.357142857142857) internal successors, (462), 196 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 462 transitions. [2021-06-05 22:26:48,096 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 462 transitions. Word has length 19 [2021-06-05 22:26:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:48,096 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 462 transitions. [2021-06-05 22:26:48,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 462 transitions. [2021-06-05 22:26:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:48,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:48,096 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:48,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17098,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:48,297 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:48,297 INFO L82 PathProgramCache]: Analyzing trace with hash -742167062, now seen corresponding path program 679 times [2021-06-05 22:26:48,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:48,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93970312] [2021-06-05 22:26:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:48,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93970312] [2021-06-05 22:26:48,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93970312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843664335] [2021-06-05 22:26:48,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:48,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:48,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:48,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:48,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:48,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:48,557 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:48,557 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:48,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:48,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843664335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:48,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:48,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698858461] [2021-06-05 22:26:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:48,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:48,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:48,582 INFO L87 Difference]: Start difference. First operand 197 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:49,211 INFO L93 Difference]: Finished difference Result 519 states and 1068 transitions. [2021-06-05 22:26:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:26:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:49,212 INFO L225 Difference]: With dead ends: 519 [2021-06-05 22:26:49,212 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 22:26:49,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:26:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 22:26:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 194. [2021-06-05 22:26:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.33160621761658) internal successors, (450), 193 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 450 transitions. [2021-06-05 22:26:49,215 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 450 transitions. Word has length 19 [2021-06-05 22:26:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 450 transitions. [2021-06-05 22:26:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 450 transitions. [2021-06-05 22:26:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:49,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:49,215 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:49,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17118,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:49,416 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1114023349, now seen corresponding path program 680 times [2021-06-05 22:26:49,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:49,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203132584] [2021-06-05 22:26:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:49,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203132584] [2021-06-05 22:26:49,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203132584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824343314] [2021-06-05 22:26:49,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:49,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:26:49,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:49,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:49,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:49,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:26:49,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:49,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:49,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:49,801 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:26:49,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-06-05 22:26:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:49,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:49,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:49,818 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:49,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:26:49,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:26:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:49,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824343314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:49,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:49,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:49,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803834031] [2021-06-05 22:26:49,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:49,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:49,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:49,849 INFO L87 Difference]: Start difference. First operand 194 states and 450 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:50,472 INFO L93 Difference]: Finished difference Result 385 states and 800 transitions. [2021-06-05 22:26:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:26:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:50,473 INFO L225 Difference]: With dead ends: 385 [2021-06-05 22:26:50,473 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 22:26:50,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:26:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 22:26:50,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 184. [2021-06-05 22:26:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.273224043715847) internal successors, (416), 183 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 416 transitions. [2021-06-05 22:26:50,475 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 416 transitions. Word has length 19 [2021-06-05 22:26:50,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:50,476 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 416 transitions. [2021-06-05 22:26:50,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:50,476 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 416 transitions. [2021-06-05 22:26:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:50,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:50,476 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:50,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17122,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:50,676 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1533791526, now seen corresponding path program 681 times [2021-06-05 22:26:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:50,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315605630] [2021-06-05 22:26:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:50,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:50,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315605630] [2021-06-05 22:26:50,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315605630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:50,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317111368] [2021-06-05 22:26:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:50,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:26:50,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:50,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:50,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:50,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:50,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:50,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:50,945 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:50,945 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:50,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:50,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:51,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317111368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:51,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:51,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491695013] [2021-06-05 22:26:51,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:51,000 INFO L87 Difference]: Start difference. First operand 184 states and 416 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:53,516 INFO L93 Difference]: Finished difference Result 542 states and 1062 transitions. [2021-06-05 22:26:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:26:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:53,517 INFO L225 Difference]: With dead ends: 542 [2021-06-05 22:26:53,517 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 22:26:53,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2261.2ms TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:26:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 22:26:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 193. [2021-06-05 22:26:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 22:26:53,520 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 22:26:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:53,520 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 22:26:53,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 22:26:53,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:53,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:53,520 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:53,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17138 [2021-06-05 22:26:53,721 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1280636261, now seen corresponding path program 682 times [2021-06-05 22:26:53,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:53,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957581405] [2021-06-05 22:26:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:53,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:53,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957581405] [2021-06-05 22:26:53,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957581405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:53,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194121199] [2021-06-05 22:26:53,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:53,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:26:53,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:53,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:53,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:53,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:53,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:54,031 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:26:54,031 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:54,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:54,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:54,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:54,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-06-05 22:26:54,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:54,050 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:54,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194121199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799332131] [2021-06-05 22:26:54,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:54,108 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:54,632 INFO L93 Difference]: Finished difference Result 371 states and 765 transitions. [2021-06-05 22:26:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:26:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:54,633 INFO L225 Difference]: With dead ends: 371 [2021-06-05 22:26:54,633 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 22:26:54,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:26:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 22:26:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 193. [2021-06-05 22:26:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 22:26:54,635 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 22:26:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 22:26:54,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 22:26:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:54,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:54,635 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:54,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 686 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17148 [2021-06-05 22:26:54,836 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash 833298538, now seen corresponding path program 683 times [2021-06-05 22:26:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:54,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316348811] [2021-06-05 22:26:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:54,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316348811] [2021-06-05 22:26:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316348811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853711010] [2021-06-05 22:26:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:54,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:26:54,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:55,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:55,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:55,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:55,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:55,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:55,103 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:26:55,103 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:55,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:55,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:26:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:55,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853711010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:55,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:55,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:55,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468070740] [2021-06-05 22:26:55,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:55,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:55,151 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:56,646 INFO L93 Difference]: Finished difference Result 505 states and 1011 transitions. [2021-06-05 22:26:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:26:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:56,647 INFO L225 Difference]: With dead ends: 505 [2021-06-05 22:26:56,647 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 22:26:56,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1365.1ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:26:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 22:26:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 186. [2021-06-05 22:26:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2864864864864867) internal successors, (423), 185 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 423 transitions. [2021-06-05 22:26:56,649 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 423 transitions. Word has length 19 [2021-06-05 22:26:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:56,649 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 423 transitions. [2021-06-05 22:26:56,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 423 transitions. [2021-06-05 22:26:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:56,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:56,650 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:56,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17159 [2021-06-05 22:26:56,850 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1149498707, now seen corresponding path program 684 times [2021-06-05 22:26:56,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:56,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012487875] [2021-06-05 22:26:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:56,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012487875] [2021-06-05 22:26:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012487875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014647750] [2021-06-05 22:26:56,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:56,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:26:56,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:26:56,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:56,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:57,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:26:57,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:57,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:57,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:57,178 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:26:57,179 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:57,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:26:57,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:57,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:26:57,197 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-06-05 22:26:57,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:26:57,198 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:26:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:57,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014647750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:57,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:57,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:57,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279502029] [2021-06-05 22:26:57,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:57,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:57,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:57,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:57,278 INFO L87 Difference]: Start difference. First operand 186 states and 423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:58,094 INFO L93 Difference]: Finished difference Result 340 states and 701 transitions. [2021-06-05 22:26:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:26:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:58,094 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:26:58,094 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 22:26:58,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:26:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 22:26:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 185. [2021-06-05 22:26:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.282608695652174) internal successors, (420), 184 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 420 transitions. [2021-06-05 22:26:58,096 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 420 transitions. Word has length 19 [2021-06-05 22:26:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:58,097 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 420 transitions. [2021-06-05 22:26:58,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 420 transitions. [2021-06-05 22:26:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:58,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:58,097 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:58,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17167,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:58,297 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash 298068736, now seen corresponding path program 685 times [2021-06-05 22:26:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:58,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121090821] [2021-06-05 22:26:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:58,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:26:58,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121090821] [2021-06-05 22:26:58,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121090821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:58,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470880528] [2021-06-05 22:26:58,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:26:58,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:26:58,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:26:58,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:58,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:58,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:26:58,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:58,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:26:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:26:58,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:26:58,577 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:26:58,577 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:26:58,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:26:58,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:26:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:26:58,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470880528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:26:58,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:26:58,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:26:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059890547] [2021-06-05 22:26:58,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:26:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:26:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:26:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:26:58,602 INFO L87 Difference]: Start difference. First operand 185 states and 420 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:26:59,768 INFO L93 Difference]: Finished difference Result 388 states and 818 transitions. [2021-06-05 22:26:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:26:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:26:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:26:59,769 INFO L225 Difference]: With dead ends: 388 [2021-06-05 22:26:59,769 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 22:26:59,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1064.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:26:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 22:26:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 179. [2021-06-05 22:26:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.264044943820225) internal successors, (403), 178 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 403 transitions. [2021-06-05 22:26:59,771 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 403 transitions. Word has length 19 [2021-06-05 22:26:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:26:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 403 transitions. [2021-06-05 22:26:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:26:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 403 transitions. [2021-06-05 22:26:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:26:59,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:26:59,772 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:26:59,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17181,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:26:59,972 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:26:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:26:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash -73787551, now seen corresponding path program 686 times [2021-06-05 22:26:59,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:26:59,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39943071] [2021-06-05 22:26:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:26:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:00,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39943071] [2021-06-05 22:27:00,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39943071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:00,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375425682] [2021-06-05 22:27:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:00,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:00,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:00,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:00,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:00,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:00,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:00,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:00,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:00,364 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:00,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:00,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:00,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:00,381 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:00,381 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-06-05 22:27:00,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:00,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:00,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375425682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:00,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:00,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:00,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187932524] [2021-06-05 22:27:00,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:00,412 INFO L87 Difference]: Start difference. First operand 179 states and 403 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:00,916 INFO L93 Difference]: Finished difference Result 284 states and 604 transitions. [2021-06-05 22:27:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:27:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:00,917 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:27:00,917 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 22:27:00,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 22:27:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-06-05 22:27:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 22:27:00,919 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 22:27:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:00,919 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 22:27:00,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 22:27:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:00,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:00,919 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:01,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17185 [2021-06-05 22:27:01,120 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:01,120 INFO L82 PathProgramCache]: Analyzing trace with hash 885814058, now seen corresponding path program 687 times [2021-06-05 22:27:01,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:01,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617750694] [2021-06-05 22:27:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:01,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617750694] [2021-06-05 22:27:01,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617750694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236536511] [2021-06-05 22:27:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:01,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:27:01,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:01,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:01,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:01,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:01,391 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:01,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:01,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:01,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:01,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236536511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:01,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:01,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216887430] [2021-06-05 22:27:01,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:01,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:01,416 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:01,778 INFO L93 Difference]: Finished difference Result 333 states and 703 transitions. [2021-06-05 22:27:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:01,779 INFO L225 Difference]: With dead ends: 333 [2021-06-05 22:27:01,779 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 22:27:01,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 22:27:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 175. [2021-06-05 22:27:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 22:27:01,781 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 22:27:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:01,781 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 22:27:01,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 22:27:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:01,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:01,782 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:01,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17212 [2021-06-05 22:27:01,982 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:01,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1086480083, now seen corresponding path program 688 times [2021-06-05 22:27:01,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:01,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091024602] [2021-06-05 22:27:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:02,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091024602] [2021-06-05 22:27:02,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091024602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:02,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845732917] [2021-06-05 22:27:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:02,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:02,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:02,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:02,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:02,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:02,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:02,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:02,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:02,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:02,393 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:02,393 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:02,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:02,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:02,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:02,410 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-06-05 22:27:02,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:02,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:02,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845732917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:02,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:02,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:02,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836883] [2021-06-05 22:27:02,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:02,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:02,441 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:02,873 INFO L93 Difference]: Finished difference Result 275 states and 582 transitions. [2021-06-05 22:27:02,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:27:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:02,874 INFO L225 Difference]: With dead ends: 275 [2021-06-05 22:27:02,874 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 22:27:02,874 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 509.3ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:02,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 22:27:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2021-06-05 22:27:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 22:27:02,876 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 22:27:02,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:02,876 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 22:27:02,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 22:27:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:02,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:02,876 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:03,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17216,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:03,077 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -578637104, now seen corresponding path program 689 times [2021-06-05 22:27:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:03,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607788790] [2021-06-05 22:27:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:03,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:03,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607788790] [2021-06-05 22:27:03,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607788790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:03,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088202362] [2021-06-05 22:27:03,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:03,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:03,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:03,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:03,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:03,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:03,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:03,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:03,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:03,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:03,364 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:27:03,364 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:03,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:03,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:27:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088202362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:03,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:03,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:03,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145920451] [2021-06-05 22:27:03,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:03,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:03,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:03,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:03,421 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:03,900 INFO L93 Difference]: Finished difference Result 304 states and 636 transitions. [2021-06-05 22:27:03,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:27:03,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:03,900 INFO L225 Difference]: With dead ends: 304 [2021-06-05 22:27:03,900 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 22:27:03,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 22:27:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 180. [2021-06-05 22:27:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:03,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 22:27:03,902 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 22:27:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:03,902 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 22:27:03,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 22:27:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:03,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:03,903 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:04,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17232 [2021-06-05 22:27:04,103 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -831792369, now seen corresponding path program 690 times [2021-06-05 22:27:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876055967] [2021-06-05 22:27:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:04,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:04,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876055967] [2021-06-05 22:27:04,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876055967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:04,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548941188] [2021-06-05 22:27:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:04,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:04,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:27:04,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:04,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:04,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:04,436 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:27:04,436 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:04,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:04,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:04,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:04,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_777 vanished before elimination [2021-06-05 22:27:04,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:04,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:27:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:04,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548941188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:04,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:04,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53786057] [2021-06-05 22:27:04,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:04,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:04,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:04,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:04,513 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:04,718 INFO L93 Difference]: Finished difference Result 289 states and 613 transitions. [2021-06-05 22:27:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:04,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:04,718 INFO L225 Difference]: With dead ends: 289 [2021-06-05 22:27:04,718 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 22:27:04,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 22:27:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 180. [2021-06-05 22:27:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 22:27:04,720 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 22:27:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:04,720 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 22:27:04,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:04,720 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 22:27:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:04,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:04,721 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:04,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17242,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:04,921 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1279130092, now seen corresponding path program 691 times [2021-06-05 22:27:04,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:04,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771840322] [2021-06-05 22:27:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:05,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771840322] [2021-06-05 22:27:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771840322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655114490] [2021-06-05 22:27:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:05,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:05,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:05,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:05,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:05,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:05,210 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:27:05,210 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:05,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:05,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:27:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655114490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:05,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:05,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106245072] [2021-06-05 22:27:05,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:05,260 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:05,683 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2021-06-05 22:27:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:05,684 INFO L225 Difference]: With dead ends: 304 [2021-06-05 22:27:05,684 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 22:27:05,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:27:05,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 22:27:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 180. [2021-06-05 22:27:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 22:27:05,686 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 22:27:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:05,687 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 22:27:05,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 22:27:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:05,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:05,687 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:05,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17253 [2021-06-05 22:27:05,893 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1033039959, now seen corresponding path program 692 times [2021-06-05 22:27:05,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:05,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997798161] [2021-06-05 22:27:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:05,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997798161] [2021-06-05 22:27:05,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997798161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91476472] [2021-06-05 22:27:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:06,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:06,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:06,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:06,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:06,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:06,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:06,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:27:06,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:06,239 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:27:06,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:06,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:06,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:06,257 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:06,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_780 vanished before elimination [2021-06-05 22:27:06,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:06,258 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:27:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:06,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91476472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:06,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:06,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722734340] [2021-06-05 22:27:06,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:06,339 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:06,727 INFO L93 Difference]: Finished difference Result 291 states and 614 transitions. [2021-06-05 22:27:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:06,728 INFO L225 Difference]: With dead ends: 291 [2021-06-05 22:27:06,728 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 22:27:06,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 22:27:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 179. [2021-06-05 22:27:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.258426966292135) internal successors, (402), 178 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 402 transitions. [2021-06-05 22:27:06,730 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 402 transitions. Word has length 19 [2021-06-05 22:27:06,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:06,730 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 402 transitions. [2021-06-05 22:27:06,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 402 transitions. [2021-06-05 22:27:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:06,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:06,730 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:06,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17261,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:06,931 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1814359894, now seen corresponding path program 693 times [2021-06-05 22:27:06,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:06,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853751515] [2021-06-05 22:27:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:07,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:07,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853751515] [2021-06-05 22:27:07,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853751515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278581946] [2021-06-05 22:27:07,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:07,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:07,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:07,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:07,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:07,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:07,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,236 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:07,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:07,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:07,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278581946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:07,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:07,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484929355] [2021-06-05 22:27:07,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:07,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:07,262 INFO L87 Difference]: Start difference. First operand 179 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:07,444 INFO L93 Difference]: Finished difference Result 286 states and 611 transitions. [2021-06-05 22:27:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:07,445 INFO L225 Difference]: With dead ends: 286 [2021-06-05 22:27:07,445 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:27:07,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:27:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-06-05 22:27:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 22:27:07,447 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 22:27:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:07,447 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 22:27:07,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 22:27:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:07,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:07,447 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:07,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17275 [2021-06-05 22:27:07,648 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1226614572, now seen corresponding path program 694 times [2021-06-05 22:27:07,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:07,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126742464] [2021-06-05 22:27:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126742464] [2021-06-05 22:27:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126742464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813791374] [2021-06-05 22:27:07,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:07,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:07,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:07,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:07,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,937 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:07,937 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:07,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:07,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813791374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:07,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:07,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787006020] [2021-06-05 22:27:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:07,964 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:08,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:08,196 INFO L93 Difference]: Finished difference Result 287 states and 615 transitions. [2021-06-05 22:27:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:08,197 INFO L225 Difference]: With dead ends: 287 [2021-06-05 22:27:08,197 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 22:27:08,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 22:27:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 178. [2021-06-05 22:27:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 22:27:08,199 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 22:27:08,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:08,199 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 22:27:08,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 22:27:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:08,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:08,199 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:08,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17279,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:08,400 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1096058583, now seen corresponding path program 695 times [2021-06-05 22:27:08,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:08,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041036858] [2021-06-05 22:27:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:08,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:08,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041036858] [2021-06-05 22:27:08,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041036858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:08,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847531710] [2021-06-05 22:27:08,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:08,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:08,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:08,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:08,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:08,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:08,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:08,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:08,867 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:08,867 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:08,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:08,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:08,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:08,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_786 vanished before elimination [2021-06-05 22:27:08,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:08,885 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:08,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847531710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:08,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:08,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:08,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766264193] [2021-06-05 22:27:08,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:08,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:08,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:08,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:08,917 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,225 INFO L93 Difference]: Finished difference Result 274 states and 586 transitions. [2021-06-05 22:27:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,226 INFO L225 Difference]: With dead ends: 274 [2021-06-05 22:27:09,226 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 22:27:09,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 22:27:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2021-06-05 22:27:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-05 22:27:09,228 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 19 [2021-06-05 22:27:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,228 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-05 22:27:09,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-05 22:27:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:09,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,228 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:09,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17283 [2021-06-05 22:27:09,429 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -186378774, now seen corresponding path program 696 times [2021-06-05 22:27:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172371180] [2021-06-05 22:27:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172371180] [2021-06-05 22:27:09,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172371180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355869476] [2021-06-05 22:27:09,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:09,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:09,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:09,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:09,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:09,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:09,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:09,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:09,713 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:09,714 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:09,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:09,714 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355869476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:09,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:09,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067465349] [2021-06-05 22:27:09,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:09,739 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,930 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-06-05 22:27:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,931 INFO L225 Difference]: With dead ends: 282 [2021-06-05 22:27:09,931 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 22:27:09,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 22:27:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 173. [2021-06-05 22:27:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 22:27:09,933 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 22:27:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,933 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 22:27:09,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 22:27:09,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:09,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,933 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:10,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17309 [2021-06-05 22:27:10,134 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash -232638837, now seen corresponding path program 697 times [2021-06-05 22:27:10,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:10,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964588130] [2021-06-05 22:27:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964588130] [2021-06-05 22:27:10,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964588130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379675802] [2021-06-05 22:27:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:10,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:10,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:10,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:10,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:10,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:10,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:10,599 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:10,600 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:10,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:10,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:10,616 INFO L518 ElimStorePlain]: Eliminatee v_prenex_792 vanished before elimination [2021-06-05 22:27:10,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:10,617 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379675802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:10,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976384980] [2021-06-05 22:27:10,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:10,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:10,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:10,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:10,648 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:10,948 INFO L93 Difference]: Finished difference Result 267 states and 567 transitions. [2021-06-05 22:27:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:10,949 INFO L225 Difference]: With dead ends: 267 [2021-06-05 22:27:10,949 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 22:27:10,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 22:27:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2021-06-05 22:27:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 22:27:10,951 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 22:27:10,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:10,951 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 22:27:10,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 22:27:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:10,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:10,951 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:11,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17313 [2021-06-05 22:27:11,152 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2019085248, now seen corresponding path program 698 times [2021-06-05 22:27:11,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:11,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253871888] [2021-06-05 22:27:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253871888] [2021-06-05 22:27:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253871888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168292915] [2021-06-05 22:27:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:11,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:11,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:11,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:11,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:11,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:11,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:11,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:11,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:11,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:11,452 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:27:11,452 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:11,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:11,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:27:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168292915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:11,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:11,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256116897] [2021-06-05 22:27:11,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:11,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:11,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:11,510 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:12,071 INFO L93 Difference]: Finished difference Result 300 states and 624 transitions. [2021-06-05 22:27:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:27:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:12,072 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:27:12,072 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 22:27:12,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 538.0ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 22:27:12,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 176. [2021-06-05 22:27:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 22:27:12,074 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 22:27:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:12,074 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 22:27:12,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 22:27:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:12,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:12,074 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:12,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17339,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:12,275 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:12,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1765929983, now seen corresponding path program 699 times [2021-06-05 22:27:12,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:12,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614706290] [2021-06-05 22:27:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614706290] [2021-06-05 22:27:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614706290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201672142] [2021-06-05 22:27:12,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:12,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:12,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:27:12,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:12,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:12,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:12,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:12,643 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 22:27:12,643 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:12,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:12,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:12,661 INFO L518 ElimStorePlain]: Eliminatee v_prenex_795 vanished before elimination [2021-06-05 22:27:12,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:12,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:27:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201672142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:12,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:12,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905604653] [2021-06-05 22:27:12,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:12,722 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:13,236 INFO L93 Difference]: Finished difference Result 362 states and 758 transitions. [2021-06-05 22:27:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:13,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:13,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:13,237 INFO L225 Difference]: With dead ends: 362 [2021-06-05 22:27:13,237 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 22:27:13,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:27:13,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 22:27:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2021-06-05 22:27:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 22:27:13,239 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 22:27:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:13,239 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 22:27:13,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 22:27:13,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:13,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:13,239 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:13,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17349,703 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:13,440 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1318592260, now seen corresponding path program 700 times [2021-06-05 22:27:13,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:13,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63052692] [2021-06-05 22:27:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:13,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63052692] [2021-06-05 22:27:13,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63052692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606958520] [2021-06-05 22:27:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:13,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:13,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:13,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:13,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:13,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:13,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:13,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:13,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:13,753 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 22:27:13,753 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:13,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:13,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 22:27:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:13,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606958520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:13,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:13,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061768951] [2021-06-05 22:27:13,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:13,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:13,802 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:14,292 INFO L93 Difference]: Finished difference Result 303 states and 633 transitions. [2021-06-05 22:27:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:14,293 INFO L225 Difference]: With dead ends: 303 [2021-06-05 22:27:14,293 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 22:27:14,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 502.4ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 22:27:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 176. [2021-06-05 22:27:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 22:27:14,295 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 22:27:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:14,295 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 22:27:14,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 22:27:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:14,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:14,295 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:14,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17360,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:14,496 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash -664204985, now seen corresponding path program 701 times [2021-06-05 22:27:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:14,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349499768] [2021-06-05 22:27:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:14,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:14,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349499768] [2021-06-05 22:27:14,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349499768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261976773] [2021-06-05 22:27:14,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:14,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:14,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:14,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:14,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:14,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:14,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:14,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:14,884 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 22:27:14,884 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:14,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 22:27:14,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:14,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:14,902 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-05 22:27:14,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:27:14,903 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 22:27:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:14,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261976773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:14,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:14,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572288372] [2021-06-05 22:27:14,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:14,986 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:15,943 INFO L93 Difference]: Finished difference Result 364 states and 759 transitions. [2021-06-05 22:27:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:27:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:15,944 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:27:15,944 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 22:27:15,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 940.3ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 22:27:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 175. [2021-06-05 22:27:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 22:27:15,946 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 22:27:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:15,946 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 22:27:15,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 22:27:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:15,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:15,946 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:16,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17368 [2021-06-05 22:27:16,147 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 783362458, now seen corresponding path program 702 times [2021-06-05 22:27:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:16,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134903754] [2021-06-05 22:27:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:16,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134903754] [2021-06-05 22:27:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134903754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849709769] [2021-06-05 22:27:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:16,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:16,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:16,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:16,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:16,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:16,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:16,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:16,464 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:16,464 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:16,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:16,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849709769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:16,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:16,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576946335] [2021-06-05 22:27:16,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:16,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:16,490 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:16,694 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-05 22:27:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:16,695 INFO L225 Difference]: With dead ends: 282 [2021-06-05 22:27:16,695 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 22:27:16,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 22:27:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 175. [2021-06-05 22:27:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 22:27:16,697 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 22:27:16,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:16,697 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 22:27:16,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 22:27:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:16,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:16,697 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:16,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17388 [2021-06-05 22:27:16,898 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash 411506171, now seen corresponding path program 703 times [2021-06-05 22:27:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:16,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746986763] [2021-06-05 22:27:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746986763] [2021-06-05 22:27:16,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746986763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278828080] [2021-06-05 22:27:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:17,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:17,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:17,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:17,359 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:17,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:17,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:17,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:17,376 INFO L518 ElimStorePlain]: Eliminatee v_prenex_804 vanished before elimination [2021-06-05 22:27:17,376 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:17,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:17,377 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:17,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278828080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:17,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:17,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:17,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663115018] [2021-06-05 22:27:17,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:17,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:17,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:17,408 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:17,942 INFO L93 Difference]: Finished difference Result 356 states and 741 transitions. [2021-06-05 22:27:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:27:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:17,943 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:27:17,943 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 22:27:17,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 22:27:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 174. [2021-06-05 22:27:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 22:27:17,945 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 22:27:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:17,945 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 22:27:17,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 22:27:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:17,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:17,945 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:18,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17392 [2021-06-05 22:27:18,146 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:18,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1371107780, now seen corresponding path program 704 times [2021-06-05 22:27:18,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:18,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564786841] [2021-06-05 22:27:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:18,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564786841] [2021-06-05 22:27:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564786841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943063200] [2021-06-05 22:27:18,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:18,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:18,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:18,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:18,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:18,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:18,444 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:18,444 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:18,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:18,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:18,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943063200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:18,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:18,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:18,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110761852] [2021-06-05 22:27:18,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:18,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:18,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:18,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:18,470 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:18,727 INFO L93 Difference]: Finished difference Result 283 states and 602 transitions. [2021-06-05 22:27:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:18,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:18,728 INFO L225 Difference]: With dead ends: 283 [2021-06-05 22:27:18,728 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 22:27:18,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 22:27:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 174. [2021-06-05 22:27:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 22:27:18,730 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 22:27:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:18,730 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 22:27:18,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 22:27:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:18,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:18,730 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:18,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17408,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:18,931 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:18,931 INFO L82 PathProgramCache]: Analyzing trace with hash -601186361, now seen corresponding path program 705 times [2021-06-05 22:27:18,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:18,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190065772] [2021-06-05 22:27:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190065772] [2021-06-05 22:27:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190065772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8467117] [2021-06-05 22:27:19,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:19,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:27:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:19,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:19,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:19,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:19,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:19,384 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:19,385 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:19,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:19,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:19,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:19,401 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 22:27:19,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:19,402 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8467117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:19,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207892324] [2021-06-05 22:27:19,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:19,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:19,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:19,433 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:19,956 INFO L93 Difference]: Finished difference Result 356 states and 739 transitions. [2021-06-05 22:27:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:19,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:19,956 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:27:19,956 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 22:27:19,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 22:27:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 173. [2021-06-05 22:27:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 22:27:19,958 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 22:27:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 22:27:19,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 22:27:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:19,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:19,959 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:20,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17412 [2021-06-05 22:27:20,159 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:20,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1883623718, now seen corresponding path program 706 times [2021-06-05 22:27:20,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:20,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947266873] [2021-06-05 22:27:20,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:20,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:20,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947266873] [2021-06-05 22:27:20,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947266873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489722869] [2021-06-05 22:27:20,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:20,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:20,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:20,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:20,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:20,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:20,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:20,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:20,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:20,457 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 22:27:20,457 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:20,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:27:20,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 22:27:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:20,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489722869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:20,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:20,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948662958] [2021-06-05 22:27:20,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:20,483 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:20,771 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-06-05 22:27:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:20,772 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:27:20,772 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 22:27:20,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 22:27:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 173. [2021-06-05 22:27:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 22:27:20,775 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 22:27:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:20,775 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 22:27:20,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 22:27:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:20,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:20,775 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:20,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17439,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:20,981 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1929883781, now seen corresponding path program 707 times [2021-06-05 22:27:20,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:20,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594638421] [2021-06-05 22:27:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:21,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594638421] [2021-06-05 22:27:21,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594638421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545856382] [2021-06-05 22:27:21,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:21,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:21,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:21,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:21,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 22:27:21,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:21,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:27:21,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:21,454 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 22:27:21,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:21,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:21,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:21,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-06-05 22:27:21,471 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:21,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:21,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 22:27:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545856382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:21,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 22:27:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442570448] [2021-06-05 22:27:21,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:21,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:21,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:21,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:21,503 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:21,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:22,000 INFO L93 Difference]: Finished difference Result 356 states and 737 transitions. [2021-06-05 22:27:22,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:22,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:22,000 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:27:22,000 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 22:27:22,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 22:27:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 172. [2021-06-05 22:27:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 22:27:22,002 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 22:27:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:22,002 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 22:27:22,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 22:27:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:22,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:22,003 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:22,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17443 [2021-06-05 22:27:22,203 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:22,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:22,203 INFO L82 PathProgramCache]: Analyzing trace with hash -968542230, now seen corresponding path program 708 times [2021-06-05 22:27:22,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:22,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607092482] [2021-06-05 22:27:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607092482] [2021-06-05 22:27:22,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607092482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298009909] [2021-06-05 22:27:22,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:22,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298009909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 22:27:22,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507494223] [2021-06-05 22:27:22,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:27:22,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:27:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:27:22,459 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:22,701 INFO L93 Difference]: Finished difference Result 366 states and 757 transitions. [2021-06-05 22:27:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:22,702 INFO L225 Difference]: With dead ends: 366 [2021-06-05 22:27:22,702 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 22:27:22,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 22:27:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 166. [2021-06-05 22:27:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.212121212121212) internal successors, (365), 165 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 365 transitions. [2021-06-05 22:27:22,704 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 365 transitions. Word has length 19 [2021-06-05 22:27:22,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:22,704 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 365 transitions. [2021-06-05 22:27:22,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 365 transitions. [2021-06-05 22:27:22,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 22:27:22,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:22,705 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:22,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17459 [2021-06-05 22:27:22,905 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1437288019, now seen corresponding path program 709 times [2021-06-05 22:27:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:22,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368215175] [2021-06-05 22:27:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:22,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368215175] [2021-06-05 22:27:22,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368215175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025881213] [2021-06-05 22:27:22,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:23,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:27:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025881213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:23,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 22:27:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540524252] [2021-06-05 22:27:23,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:27:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:27:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:27:23,193 INFO L87 Difference]: Start difference. First operand 166 states and 365 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:23,552 INFO L93 Difference]: Finished difference Result 331 states and 692 transitions. [2021-06-05 22:27:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:23,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 22:27:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:23,553 INFO L225 Difference]: With dead ends: 331 [2021-06-05 22:27:23,553 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 22:27:23,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:27:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 22:27:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 166. [2021-06-05 22:27:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.206060606060606) internal successors, (364), 165 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 364 transitions. [2021-06-05 22:27:23,555 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 364 transitions. Word has length 19 [2021-06-05 22:27:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:23,555 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 364 transitions. [2021-06-05 22:27:23,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,555 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 364 transitions. [2021-06-05 22:27:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:23,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:23,556 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:23,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17462,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:23,756 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1380416285, now seen corresponding path program 710 times [2021-06-05 22:27:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:23,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505473567] [2021-06-05 22:27:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:24,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:24,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505473567] [2021-06-05 22:27:24,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505473567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:24,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477866566] [2021-06-05 22:27:24,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:24,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:24,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:24,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477866566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:24,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:24,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:24,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951336016] [2021-06-05 22:27:24,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:24,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:24,408 INFO L87 Difference]: Start difference. First operand 166 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:25,168 INFO L93 Difference]: Finished difference Result 457 states and 959 transitions. [2021-06-05 22:27:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:25,169 INFO L225 Difference]: With dead ends: 457 [2021-06-05 22:27:25,169 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 22:27:25,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1059.3ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 22:27:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 176. [2021-06-05 22:27:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1885714285714286) internal successors, (383), 175 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 383 transitions. [2021-06-05 22:27:25,171 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 383 transitions. Word has length 20 [2021-06-05 22:27:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:25,172 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 383 transitions. [2021-06-05 22:27:25,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 383 transitions. [2021-06-05 22:27:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:25,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:25,172 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:25,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-06-05 22:27:25,372 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1059407069, now seen corresponding path program 711 times [2021-06-05 22:27:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:25,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173992855] [2021-06-05 22:27:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:25,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173992855] [2021-06-05 22:27:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173992855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:25,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395292100] [2021-06-05 22:27:25,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:25,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:27:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395292100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:26,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:26,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:26,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452044295] [2021-06-05 22:27:26,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:26,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:26,038 INFO L87 Difference]: Start difference. First operand 176 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:26,628 INFO L93 Difference]: Finished difference Result 461 states and 967 transitions. [2021-06-05 22:27:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:26,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:26,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:26,628 INFO L225 Difference]: With dead ends: 461 [2021-06-05 22:27:26,628 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:27:26,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 886.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:27:26,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:27:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 177. [2021-06-05 22:27:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1931818181818183) internal successors, (386), 176 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 386 transitions. [2021-06-05 22:27:26,631 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 386 transitions. Word has length 20 [2021-06-05 22:27:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:26,631 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 386 transitions. [2021-06-05 22:27:26,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 386 transitions. [2021-06-05 22:27:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:26,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:26,631 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:26,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17479 [2021-06-05 22:27:26,832 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -199921313, now seen corresponding path program 712 times [2021-06-05 22:27:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:26,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547533156] [2021-06-05 22:27:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:27,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547533156] [2021-06-05 22:27:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547533156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708361797] [2021-06-05 22:27:27,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:27,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:27,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708361797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:27,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:27:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337817281] [2021-06-05 22:27:27,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:27,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:27,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:27,348 INFO L87 Difference]: Start difference. First operand 177 states and 386 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:27,906 INFO L93 Difference]: Finished difference Result 462 states and 970 transitions. [2021-06-05 22:27:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:27,907 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:27:27,907 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:27:27,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:27:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 178. [2021-06-05 22:27:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1977401129943503) internal successors, (389), 177 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 389 transitions. [2021-06-05 22:27:27,909 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 389 transitions. Word has length 20 [2021-06-05 22:27:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:27,909 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 389 transitions. [2021-06-05 22:27:27,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 389 transitions. [2021-06-05 22:27:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:27,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:27,910 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:28,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17490,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:28,110 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash 936182691, now seen corresponding path program 713 times [2021-06-05 22:27:28,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:28,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368084465] [2021-06-05 22:27:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:28,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368084465] [2021-06-05 22:27:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368084465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449412009] [2021-06-05 22:27:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:28,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:28,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:28,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:28,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:28,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449412009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:28,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:28,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:27:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741375545] [2021-06-05 22:27:28,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:28,589 INFO L87 Difference]: Start difference. First operand 178 states and 389 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:29,030 INFO L93 Difference]: Finished difference Result 463 states and 973 transitions. [2021-06-05 22:27:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:29,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:29,031 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:27:29,031 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 22:27:29,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 22:27:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 179. [2021-06-05 22:27:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.202247191011236) internal successors, (392), 178 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 392 transitions. [2021-06-05 22:27:29,033 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 392 transitions. Word has length 20 [2021-06-05 22:27:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:29,033 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 392 transitions. [2021-06-05 22:27:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 392 transitions. [2021-06-05 22:27:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:29,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:29,034 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:29,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 717 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17500 [2021-06-05 22:27:29,234 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash 695736543, now seen corresponding path program 714 times [2021-06-05 22:27:29,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:29,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778539969] [2021-06-05 22:27:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778539969] [2021-06-05 22:27:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778539969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543982231] [2021-06-05 22:27:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:29,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:27:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:29,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:27:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:30,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:27:30,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:30,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:30,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:27:30,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:27:30,251 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:30,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:27:30,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,459 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 22:27:30,460 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 22:27:30,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:30,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:30,505 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:30,506 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-06-05 22:27:30,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:30,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:30,550 INFO L518 ElimStorePlain]: Eliminatee v_prenex_829 vanished before elimination [2021-06-05 22:27:30,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:30,554 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:30,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:30,592 INFO L518 ElimStorePlain]: Eliminatee v_prenex_831 vanished before elimination [2021-06-05 22:27:30,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:27:30,594 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:27:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:30,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543982231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690424998] [2021-06-05 22:27:30,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:30,710 INFO L87 Difference]: Start difference. First operand 179 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,047 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 22:27:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:31,324 INFO L93 Difference]: Finished difference Result 464 states and 976 transitions. [2021-06-05 22:27:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:31,325 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:27:31,325 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:27:31,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:27:31,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 180. [2021-06-05 22:27:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.206703910614525) internal successors, (395), 179 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 395 transitions. [2021-06-05 22:27:31,327 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 395 transitions. Word has length 20 [2021-06-05 22:27:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:31,327 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 395 transitions. [2021-06-05 22:27:31,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 395 transitions. [2021-06-05 22:27:31,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:31,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:31,328 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:31,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17508,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:31,528 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash -4756445, now seen corresponding path program 715 times [2021-06-05 22:27:31,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:31,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816433483] [2021-06-05 22:27:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:31,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:31,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816433483] [2021-06-05 22:27:31,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816433483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004097066] [2021-06-05 22:27:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:31,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:31,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004097066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:31,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 22:27:31,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133653952] [2021-06-05 22:27:32,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:27:32,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:32,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:27:32,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:32,000 INFO L87 Difference]: Start difference. First operand 180 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:32,489 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 22:27:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:32,500 INFO L93 Difference]: Finished difference Result 476 states and 995 transitions. [2021-06-05 22:27:32,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:32,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:32,500 INFO L225 Difference]: With dead ends: 476 [2021-06-05 22:27:32,500 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 22:27:32,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 22:27:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 181. [2021-06-05 22:27:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 22:27:32,503 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 22:27:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:32,503 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 22:27:32,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 22:27:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:32,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:32,503 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:32,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17572 [2021-06-05 22:27:32,704 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1686828191, now seen corresponding path program 716 times [2021-06-05 22:27:32,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:32,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947520553] [2021-06-05 22:27:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:32,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:32,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947520553] [2021-06-05 22:27:32,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947520553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:32,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845684282] [2021-06-05 22:27:32,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:32,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:32,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:32,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845684282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 22:27:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251668148] [2021-06-05 22:27:33,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:27:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:27:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:27:33,178 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:33,610 INFO L93 Difference]: Finished difference Result 464 states and 977 transitions. [2021-06-05 22:27:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:33,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:33,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:33,610 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:27:33,610 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:27:33,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 558.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:27:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 181. [2021-06-05 22:27:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 22:27:33,613 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 22:27:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:33,613 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 22:27:33,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,613 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 22:27:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:33,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:33,613 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:33,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17582,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:33,814 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1255361233, now seen corresponding path program 717 times [2021-06-05 22:27:33,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:33,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651018473] [2021-06-05 22:27:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:34,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651018473] [2021-06-05 22:27:34,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651018473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:34,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800725448] [2021-06-05 22:27:34,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:34,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:27:34,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:34,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800725448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:34,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:34,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064092509] [2021-06-05 22:27:34,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:34,575 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:34,971 INFO L93 Difference]: Finished difference Result 346 states and 725 transitions. [2021-06-05 22:27:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:34,972 INFO L225 Difference]: With dead ends: 346 [2021-06-05 22:27:34,972 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 22:27:34,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 648.5ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 22:27:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-06-05 22:27:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.21978021978022) internal successors, (404), 182 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 404 transitions. [2021-06-05 22:27:34,974 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 404 transitions. Word has length 20 [2021-06-05 22:27:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:34,975 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 404 transitions. [2021-06-05 22:27:34,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 404 transitions. [2021-06-05 22:27:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:34,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:34,975 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:35,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17591 [2021-06-05 22:27:35,176 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:35,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2114846989, now seen corresponding path program 718 times [2021-06-05 22:27:35,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:35,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849767221] [2021-06-05 22:27:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:35,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849767221] [2021-06-05 22:27:35,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849767221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:35,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190277820] [2021-06-05 22:27:35,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:35,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:35,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:27:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:36,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:27:36,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:36,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:27:36,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:27:36,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:27:36,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:27:36,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,506 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 22:27:36,507 INFO L628 ElimStorePlain]: treesize reduction 913, result has 12.0 percent of original size [2021-06-05 22:27:36,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:36,511 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:36,555 INFO L518 ElimStorePlain]: Eliminatee v_prenex_846 vanished before elimination [2021-06-05 22:27:36,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:36,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:36,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:27:36,607 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:36,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:36,646 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:36,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_848 vanished before elimination [2021-06-05 22:27:36,647 INFO L518 ElimStorePlain]: Eliminatee v_prenex_843 vanished before elimination [2021-06-05 22:27:36,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:27:36,648 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:27:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:36,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190277820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:36,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:36,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:36,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030016341] [2021-06-05 22:27:36,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:36,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:36,764 INFO L87 Difference]: Start difference. First operand 183 states and 404 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,083 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 22:27:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:37,249 INFO L93 Difference]: Finished difference Result 350 states and 733 transitions. [2021-06-05 22:27:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:37,249 INFO L225 Difference]: With dead ends: 350 [2021-06-05 22:27:37,250 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 22:27:37,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1014.0ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 22:27:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 184. [2021-06-05 22:27:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2240437158469946) internal successors, (407), 183 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 407 transitions. [2021-06-05 22:27:37,252 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 407 transitions. Word has length 20 [2021-06-05 22:27:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:37,252 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 407 transitions. [2021-06-05 22:27:37,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 407 transitions. [2021-06-05 22:27:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:37,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:37,252 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:37,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17637,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:37,453 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1044016303, now seen corresponding path program 719 times [2021-06-05 22:27:37,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:37,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256882459] [2021-06-05 22:27:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:37,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256882459] [2021-06-05 22:27:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256882459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17300496] [2021-06-05 22:27:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:37,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:37,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:38,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17300496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:38,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:38,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:38,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360842816] [2021-06-05 22:27:38,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:38,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:38,246 INFO L87 Difference]: Start difference. First operand 184 states and 407 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:38,608 INFO L93 Difference]: Finished difference Result 351 states and 736 transitions. [2021-06-05 22:27:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:38,609 INFO L225 Difference]: With dead ends: 351 [2021-06-05 22:27:38,609 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 22:27:38,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 22:27:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 185. [2021-06-05 22:27:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.2282608695652173) internal successors, (410), 184 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 410 transitions. [2021-06-05 22:27:38,611 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 410 transitions. Word has length 20 [2021-06-05 22:27:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:38,611 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 410 transitions. [2021-06-05 22:27:38,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 410 transitions. [2021-06-05 22:27:38,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:38,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:38,611 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:38,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17684,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:38,812 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:38,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:38,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1284462451, now seen corresponding path program 720 times [2021-06-05 22:27:38,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:38,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122577695] [2021-06-05 22:27:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:39,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:39,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122577695] [2021-06-05 22:27:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122577695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:39,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322713682] [2021-06-05 22:27:39,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:39,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:27:39,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:27:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 22:27:39,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:27:39,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 22:27:39,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:39,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:39,750 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 22:27:39,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,948 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 22:27:39,948 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 22:27:39,948 INFO L518 ElimStorePlain]: Eliminatee v_prenex_856 vanished before elimination [2021-06-05 22:27:39,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:39,952 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:39,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:39,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:39,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:40,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:40,040 INFO L518 ElimStorePlain]: Eliminatee v_prenex_858 vanished before elimination [2021-06-05 22:27:40,040 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:40,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:40,044 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:40,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:40,083 INFO L518 ElimStorePlain]: Eliminatee v_prenex_860 vanished before elimination [2021-06-05 22:27:40,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:27:40,085 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:27:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:40,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322713682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:40,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:40,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370790767] [2021-06-05 22:27:40,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:40,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:40,200 INFO L87 Difference]: Start difference. First operand 185 states and 410 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:40,586 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 22:27:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:40,722 INFO L93 Difference]: Finished difference Result 352 states and 739 transitions. [2021-06-05 22:27:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:40,723 INFO L225 Difference]: With dead ends: 352 [2021-06-05 22:27:40,723 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:27:40,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 830.3ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:27:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 186. [2021-06-05 22:27:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-05 22:27:40,725 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-05 22:27:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:40,725 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-05 22:27:40,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-05 22:27:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:40,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:40,726 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:40,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17731 [2021-06-05 22:27:40,926 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1984955439, now seen corresponding path program 721 times [2021-06-05 22:27:40,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:40,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927481822] [2021-06-05 22:27:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:41,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927481822] [2021-06-05 22:27:41,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927481822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:41,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195885346] [2021-06-05 22:27:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:41,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195885346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:41,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:41,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:27:41,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288233792] [2021-06-05 22:27:41,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:41,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:41,530 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:41,928 INFO L93 Difference]: Finished difference Result 364 states and 758 transitions. [2021-06-05 22:27:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:41,929 INFO L225 Difference]: With dead ends: 364 [2021-06-05 22:27:41,929 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 22:27:41,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 22:27:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 187. [2021-06-05 22:27:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.2419354838709675) internal successors, (417), 186 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 417 transitions. [2021-06-05 22:27:41,931 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 417 transitions. Word has length 20 [2021-06-05 22:27:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:41,931 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 417 transitions. [2021-06-05 22:27:41,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 417 transitions. [2021-06-05 22:27:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:41,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:41,932 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:42,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17795 [2021-06-05 22:27:42,132 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -293370803, now seen corresponding path program 722 times [2021-06-05 22:27:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767273384] [2021-06-05 22:27:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:42,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767273384] [2021-06-05 22:27:42,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767273384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:42,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088716007] [2021-06-05 22:27:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:27:42,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:27:42,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:42,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:27:42,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:27:42,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:27:42,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:27:42,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:27:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:27:42,854 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:43,005 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 22:27:43,006 INFO L628 ElimStorePlain]: treesize reduction 680, result has 12.0 percent of original size [2021-06-05 22:27:43,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_868 vanished before elimination [2021-06-05 22:27:43,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:43,010 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:43,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:27:43,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:27:43,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:27:43,082 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:27:43,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_870 vanished before elimination [2021-06-05 22:27:43,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:27:43,084 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 22:27:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088716007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:43,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:43,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082235672] [2021-06-05 22:27:43,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:43,248 INFO L87 Difference]: Start difference. First operand 187 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:43,681 INFO L93 Difference]: Finished difference Result 352 states and 740 transitions. [2021-06-05 22:27:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:43,682 INFO L225 Difference]: With dead ends: 352 [2021-06-05 22:27:43,682 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 22:27:43,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 22:27:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 182. [2021-06-05 22:27:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2154696132596685) internal successors, (401), 181 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 401 transitions. [2021-06-05 22:27:43,684 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 401 transitions. Word has length 20 [2021-06-05 22:27:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:43,684 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 401 transitions. [2021-06-05 22:27:43,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 401 transitions. [2021-06-05 22:27:43,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:43,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:43,684 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:43,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17829 [2021-06-05 22:27:43,885 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2418359, now seen corresponding path program 723 times [2021-06-05 22:27:43,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:43,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162163185] [2021-06-05 22:27:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:44,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:44,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162163185] [2021-06-05 22:27:44,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162163185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:44,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608847248] [2021-06-05 22:27:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:44,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:27:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:44,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:44,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608847248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:44,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:44,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:44,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371848764] [2021-06-05 22:27:44,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:44,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:44,496 INFO L87 Difference]: Start difference. First operand 182 states and 401 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:45,095 INFO L93 Difference]: Finished difference Result 418 states and 851 transitions. [2021-06-05 22:27:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:27:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:45,096 INFO L225 Difference]: With dead ends: 418 [2021-06-05 22:27:45,096 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 22:27:45,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 22:27:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 206. [2021-06-05 22:27:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 22:27:45,098 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 20 [2021-06-05 22:27:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:45,098 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 22:27:45,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 22:27:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:45,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:45,099 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:45,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17866,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:45,299 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1138522363, now seen corresponding path program 724 times [2021-06-05 22:27:45,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:45,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059518766] [2021-06-05 22:27:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:45,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:45,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059518766] [2021-06-05 22:27:45,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059518766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:45,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810182885] [2021-06-05 22:27:45,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:45,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:45,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:45,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:46,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810182885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:46,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:46,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:27:46,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773135705] [2021-06-05 22:27:46,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:27:46,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:46,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:27:46,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:46,127 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:46,906 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 22:27:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:47,457 INFO L93 Difference]: Finished difference Result 419 states and 850 transitions. [2021-06-05 22:27:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:27:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:47,457 INFO L225 Difference]: With dead ends: 419 [2021-06-05 22:27:47,458 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 22:27:47,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1478.0ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:27:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 22:27:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 212. [2021-06-05 22:27:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2322274881516586) internal successors, (471), 211 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 471 transitions. [2021-06-05 22:27:47,460 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 471 transitions. Word has length 20 [2021-06-05 22:27:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:47,460 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 471 transitions. [2021-06-05 22:27:47,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 471 transitions. [2021-06-05 22:27:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:47,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:47,460 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:47,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17901,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:47,661 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:47,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 898076215, now seen corresponding path program 725 times [2021-06-05 22:27:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:47,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948710274] [2021-06-05 22:27:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:47,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:47,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948710274] [2021-06-05 22:27:47,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948710274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:47,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139676574] [2021-06-05 22:27:47,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:47,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:27:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:48,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139676574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:48,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:48,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870075533] [2021-06-05 22:27:48,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:48,315 INFO L87 Difference]: Start difference. First operand 212 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:49,115 INFO L93 Difference]: Finished difference Result 430 states and 879 transitions. [2021-06-05 22:27:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:27:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:49,116 INFO L225 Difference]: With dead ends: 430 [2021-06-05 22:27:49,116 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 22:27:49,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 22:27:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2021-06-05 22:27:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.244131455399061) internal successors, (478), 213 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 478 transitions. [2021-06-05 22:27:49,119 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 478 transitions. Word has length 20 [2021-06-05 22:27:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:49,119 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 478 transitions. [2021-06-05 22:27:49,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 478 transitions. [2021-06-05 22:27:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:49,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:49,119 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:49,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17947,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:49,320 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash 197583227, now seen corresponding path program 726 times [2021-06-05 22:27:49,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:49,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949824619] [2021-06-05 22:27:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:49,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:49,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949824619] [2021-06-05 22:27:49,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949824619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:49,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315470895] [2021-06-05 22:27:49,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:49,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:27:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:50,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315470895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:50,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:50,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:50,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302445589] [2021-06-05 22:27:50,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:50,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:50,029 INFO L87 Difference]: Start difference. First operand 214 states and 478 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:51,032 INFO L93 Difference]: Finished difference Result 431 states and 882 transitions. [2021-06-05 22:27:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:27:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:51,032 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:27:51,033 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:27:51,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:27:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:27:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 215. [2021-06-05 22:27:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2523364485981308) internal successors, (482), 214 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 482 transitions. [2021-06-05 22:27:51,035 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 482 transitions. Word has length 20 [2021-06-05 22:27:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:51,035 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 482 transitions. [2021-06-05 22:27:51,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 482 transitions. [2021-06-05 22:27:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:51,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:51,036 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:51,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17994 [2021-06-05 22:27:51,241 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1889167863, now seen corresponding path program 727 times [2021-06-05 22:27:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835696731] [2021-06-05 22:27:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:51,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:51,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835696731] [2021-06-05 22:27:51,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835696731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:51,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107900919] [2021-06-05 22:27:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:52,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107900919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:52,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:52,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:27:52,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896172268] [2021-06-05 22:27:52,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:27:52,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:52,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:27:52,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:52,067 INFO L87 Difference]: Start difference. First operand 215 states and 482 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:53,279 INFO L93 Difference]: Finished difference Result 464 states and 962 transitions. [2021-06-05 22:27:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:27:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:53,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:53,280 INFO L225 Difference]: With dead ends: 464 [2021-06-05 22:27:53,280 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 22:27:53,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1370.1ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:27:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 22:27:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 227. [2021-06-05 22:27:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2964601769911503) internal successors, (519), 226 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 519 transitions. [2021-06-05 22:27:53,282 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 519 transitions. Word has length 20 [2021-06-05 22:27:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:53,282 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 519 transitions. [2021-06-05 22:27:53,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 519 transitions. [2021-06-05 22:27:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:53,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:53,283 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:53,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18029 [2021-06-05 22:27:53,483 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2116209135, now seen corresponding path program 728 times [2021-06-05 22:27:53,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:53,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054079614] [2021-06-05 22:27:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:53,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054079614] [2021-06-05 22:27:53,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054079614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:53,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264291916] [2021-06-05 22:27:53,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:53,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:54,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264291916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:54,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:54,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:27:54,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257333681] [2021-06-05 22:27:54,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:27:54,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:27:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:54,161 INFO L87 Difference]: Start difference. First operand 227 states and 519 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:54,989 INFO L93 Difference]: Finished difference Result 523 states and 1100 transitions. [2021-06-05 22:27:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:27:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:54,990 INFO L225 Difference]: With dead ends: 523 [2021-06-05 22:27:54,990 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 22:27:54,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:27:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 22:27:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 250. [2021-06-05 22:27:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3815261044176705) internal successors, (593), 249 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 593 transitions. [2021-06-05 22:27:54,993 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 593 transitions. Word has length 20 [2021-06-05 22:27:54,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:54,993 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 593 transitions. [2021-06-05 22:27:54,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:54,993 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 593 transitions. [2021-06-05 22:27:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:54,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:54,993 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:55,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18076,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:55,194 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1938312013, now seen corresponding path program 729 times [2021-06-05 22:27:55,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:55,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580109024] [2021-06-05 22:27:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:55,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580109024] [2021-06-05 22:27:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580109024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254647004] [2021-06-05 22:27:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:55,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:55,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:55,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254647004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:55,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:55,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:55,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705578195] [2021-06-05 22:27:55,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:55,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:55,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:55,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:55,791 INFO L87 Difference]: Start difference. First operand 250 states and 593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:56,726 INFO L93 Difference]: Finished difference Result 549 states and 1151 transitions. [2021-06-05 22:27:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:27:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:56,727 INFO L225 Difference]: With dead ends: 549 [2021-06-05 22:27:56,727 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 22:27:56,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 845.8ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:27:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 22:27:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 253. [2021-06-05 22:27:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.3968253968253967) internal successors, (604), 252 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 604 transitions. [2021-06-05 22:27:56,730 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 604 transitions. Word has length 20 [2021-06-05 22:27:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:56,730 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 604 transitions. [2021-06-05 22:27:56,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 604 transitions. [2021-06-05 22:27:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:56,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:56,730 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:56,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18122 [2021-06-05 22:27:56,931 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1237819025, now seen corresponding path program 730 times [2021-06-05 22:27:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:56,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658101825] [2021-06-05 22:27:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:57,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:57,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658101825] [2021-06-05 22:27:57,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658101825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:57,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750217686] [2021-06-05 22:27:57,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:57,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:57,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:57,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750217686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:57,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:57,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:27:57,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504461382] [2021-06-05 22:27:57,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:27:57,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:27:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:27:57,642 INFO L87 Difference]: Start difference. First operand 253 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:58,196 INFO L93 Difference]: Finished difference Result 431 states and 953 transitions. [2021-06-05 22:27:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:58,197 INFO L225 Difference]: With dead ends: 431 [2021-06-05 22:27:58,197 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 22:27:58,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:27:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 22:27:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 257. [2021-06-05 22:27:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 22:27:58,200 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 22:27:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:58,200 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 22:27:58,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 22:27:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:58,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:58,200 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:58,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18169 [2021-06-05 22:27:58,401 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1365563635, now seen corresponding path program 731 times [2021-06-05 22:27:58,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:58,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951236435] [2021-06-05 22:27:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:58,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951236435] [2021-06-05 22:27:58,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951236435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970810377] [2021-06-05 22:27:58,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:58,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:27:58,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:58,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:27:58,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970810377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:58,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:27:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471349879] [2021-06-05 22:27:58,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:27:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:27:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:27:58,959 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:59,734 INFO L93 Difference]: Finished difference Result 556 states and 1172 transitions. [2021-06-05 22:27:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:27:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:59,735 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:27:59,735 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 22:27:59,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 774.2ms TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:27:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 22:27:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 257. [2021-06-05 22:27:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 22:27:59,738 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 22:27:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:59,738 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 22:27:59,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 22:27:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:59,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:59,739 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:59,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18204 [2021-06-05 22:27:59,939 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1768909961, now seen corresponding path program 732 times [2021-06-05 22:27:59,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:59,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666593503] [2021-06-05 22:27:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:00,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666593503] [2021-06-05 22:28:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666593503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745685146] [2021-06-05 22:28:00,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:00,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:28:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745685146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:00,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:00,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:28:00,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573154806] [2021-06-05 22:28:00,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:00,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:00,497 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:01,304 INFO L93 Difference]: Finished difference Result 598 states and 1288 transitions. [2021-06-05 22:28:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:28:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:01,305 INFO L225 Difference]: With dead ends: 598 [2021-06-05 22:28:01,305 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 22:28:01,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:28:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 22:28:01,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 292. [2021-06-05 22:28:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 22:28:01,308 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 22:28:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:01,308 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 22:28:01,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 22:28:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:01,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:01,309 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:01,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18239,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,509 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:01,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:01,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1825564347, now seen corresponding path program 733 times [2021-06-05 22:28:01,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:01,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119585157] [2021-06-05 22:28:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:01,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:01,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119585157] [2021-06-05 22:28:01,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119585157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422964667] [2021-06-05 22:28:01,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422964667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:01,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:28:01,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612573234] [2021-06-05 22:28:01,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:01,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:01,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:01,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:01,998 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:02,844 INFO L93 Difference]: Finished difference Result 620 states and 1327 transitions. [2021-06-05 22:28:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:28:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:02,845 INFO L225 Difference]: With dead ends: 620 [2021-06-05 22:28:02,845 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:28:02,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:28:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 293. [2021-06-05 22:28:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.4486301369863015) internal successors, (715), 292 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 715 transitions. [2021-06-05 22:28:02,848 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 715 transitions. Word has length 20 [2021-06-05 22:28:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:02,848 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 715 transitions. [2021-06-05 22:28:02,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 715 transitions. [2021-06-05 22:28:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:02,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:02,849 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:03,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18285,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,049 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash -777818313, now seen corresponding path program 734 times [2021-06-05 22:28:03,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:03,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609640224] [2021-06-05 22:28:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:03,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:03,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609640224] [2021-06-05 22:28:03,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609640224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:03,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716899691] [2021-06-05 22:28:03,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:03,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:28:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:03,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:28:03,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 22:28:03,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:28:03,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:28:03,608 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:28:03,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:03,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:28:03,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,775 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 22:28:03,776 INFO L628 ElimStorePlain]: treesize reduction 678, result has 13.0 percent of original size [2021-06-05 22:28:03,776 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:28:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:28:03,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:03,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_892 vanished before elimination [2021-06-05 22:28:03,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 22:28:03,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:03,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:03,855 INFO L518 ElimStorePlain]: Eliminatee v_prenex_895 vanished before elimination [2021-06-05 22:28:03,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 22:28:03,857 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 22:28:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:04,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716899691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:04,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:04,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:28:04,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019212454] [2021-06-05 22:28:04,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:04,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:04,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:04,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:04,025 INFO L87 Difference]: Start difference. First operand 293 states and 715 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:05,253 INFO L93 Difference]: Finished difference Result 628 states and 1346 transitions. [2021-06-05 22:28:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:28:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:05,254 INFO L225 Difference]: With dead ends: 628 [2021-06-05 22:28:05,254 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 22:28:05,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:28:05,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 22:28:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 292. [2021-06-05 22:28:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 22:28:05,258 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 22:28:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 22:28:05,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:05,258 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 22:28:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:05,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:05,258 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:05,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18333 [2021-06-05 22:28:05,459 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:05,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:05,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1290334545, now seen corresponding path program 735 times [2021-06-05 22:28:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:05,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095114965] [2021-06-05 22:28:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:05,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095114965] [2021-06-05 22:28:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095114965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890376728] [2021-06-05 22:28:05,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:05,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:28:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:05,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:06,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890376728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:06,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:06,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:28:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250107226] [2021-06-05 22:28:06,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:06,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:06,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:06,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:06,028 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:06,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:06,739 INFO L93 Difference]: Finished difference Result 620 states and 1330 transitions. [2021-06-05 22:28:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:28:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:06,740 INFO L225 Difference]: With dead ends: 620 [2021-06-05 22:28:06,740 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 22:28:06,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 553.9ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 22:28:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 295. [2021-06-05 22:28:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.45578231292517) internal successors, (722), 294 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 722 transitions. [2021-06-05 22:28:06,744 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 722 transitions. Word has length 20 [2021-06-05 22:28:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:06,744 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 722 transitions. [2021-06-05 22:28:06,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 722 transitions. [2021-06-05 22:28:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:06,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:06,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:06,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18383,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:06,945 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:06,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:06,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1313048115, now seen corresponding path program 736 times [2021-06-05 22:28:06,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:06,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440894764] [2021-06-05 22:28:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:07,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440894764] [2021-06-05 22:28:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440894764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448119563] [2021-06-05 22:28:07,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:07,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:07,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:07,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:07,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448119563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:07,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:07,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 22:28:07,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817755426] [2021-06-05 22:28:07,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:07,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:07,566 INFO L87 Difference]: Start difference. First operand 295 states and 722 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:08,254 INFO L93 Difference]: Finished difference Result 622 states and 1332 transitions. [2021-06-05 22:28:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:28:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:08,255 INFO L225 Difference]: With dead ends: 622 [2021-06-05 22:28:08,255 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 22:28:08,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 602.3ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 22:28:08,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 294. [2021-06-05 22:28:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 22:28:08,258 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 22:28:08,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:08,258 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 22:28:08,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 22:28:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:08,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:08,259 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:08,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18482 [2021-06-05 22:28:08,459 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1139800423, now seen corresponding path program 737 times [2021-06-05 22:28:08,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:08,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52846059] [2021-06-05 22:28:08,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:08,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:08,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52846059] [2021-06-05 22:28:08,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52846059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:08,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224288782] [2021-06-05 22:28:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:08,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:08,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:09,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224288782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:09,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:09,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:28:09,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22701531] [2021-06-05 22:28:09,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:09,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:09,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:09,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:09,119 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:09,773 INFO L93 Difference]: Finished difference Result 599 states and 1292 transitions. [2021-06-05 22:28:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:28:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:09,773 INFO L225 Difference]: With dead ends: 599 [2021-06-05 22:28:09,773 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 22:28:09,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 22:28:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 294. [2021-06-05 22:28:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 22:28:09,777 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 22:28:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:09,777 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 22:28:09,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 22:28:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:09,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:09,777 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:09,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:09,978 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1265437, now seen corresponding path program 738 times [2021-06-05 22:28:09,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:09,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539911544] [2021-06-05 22:28:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:10,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539911544] [2021-06-05 22:28:10,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539911544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:10,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825857340] [2021-06-05 22:28:10,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:10,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:28:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 22:28:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 22:28:11,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,114 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:28:11,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 22:28:11,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:28:11,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 22:28:11,136 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:11,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 22:28:11,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,343 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2021-06-05 22:28:11,343 INFO L628 ElimStorePlain]: treesize reduction 935, result has 11.0 percent of original size [2021-06-05 22:28:11,343 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-05 22:28:11,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:28:11,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:11,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:28:11,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:11,434 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 22:28:11,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-05 22:28:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 22:28:11,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:11,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:11,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-05 22:28:11,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 22:28:11,478 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 22:28:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:11,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825857340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:11,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:11,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:28:11,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209685350] [2021-06-05 22:28:11,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:11,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:11,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:11,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:11,597 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:11,895 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 22:28:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:12,360 INFO L93 Difference]: Finished difference Result 536 states and 1162 transitions. [2021-06-05 22:28:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:12,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:12,361 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:28:12,361 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 22:28:12,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:28:12,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 22:28:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 318. [2021-06-05 22:28:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.4574132492113563) internal successors, (779), 317 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 779 transitions. [2021-06-05 22:28:12,364 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 779 transitions. Word has length 20 [2021-06-05 22:28:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:12,364 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 779 transitions. [2021-06-05 22:28:12,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 779 transitions. [2021-06-05 22:28:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:12,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:12,365 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:12,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18704,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:12,565 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 858220319, now seen corresponding path program 739 times [2021-06-05 22:28:12,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:12,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585227225] [2021-06-05 22:28:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:12,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:12,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585227225] [2021-06-05 22:28:12,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585227225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:12,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272205369] [2021-06-05 22:28:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:13,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272205369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:13,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:13,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 22:28:13,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767458528] [2021-06-05 22:28:13,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:13,288 INFO L87 Difference]: Start difference. First operand 318 states and 779 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:14,102 INFO L93 Difference]: Finished difference Result 571 states and 1225 transitions. [2021-06-05 22:28:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:14,103 INFO L225 Difference]: With dead ends: 571 [2021-06-05 22:28:14,103 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 22:28:14,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:28:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 22:28:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 322. [2021-06-05 22:28:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.467289719626168) internal successors, (792), 321 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 792 transitions. [2021-06-05 22:28:14,110 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 792 transitions. Word has length 20 [2021-06-05 22:28:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:14,110 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 792 transitions. [2021-06-05 22:28:14,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:14,111 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 792 transitions. [2021-06-05 22:28:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:14,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:14,111 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:14,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18752,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:14,311 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1994324323, now seen corresponding path program 740 times [2021-06-05 22:28:14,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:14,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472349533] [2021-06-05 22:28:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:14,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472349533] [2021-06-05 22:28:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472349533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:14,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141153079] [2021-06-05 22:28:14,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:14,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141153079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:15,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:15,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:28:15,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266341317] [2021-06-05 22:28:15,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:15,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:15,066 INFO L87 Difference]: Start difference. First operand 322 states and 792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:15,938 INFO L93 Difference]: Finished difference Result 567 states and 1222 transitions. [2021-06-05 22:28:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:15,938 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:15,939 INFO L225 Difference]: With dead ends: 567 [2021-06-05 22:28:15,939 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 22:28:15,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:28:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 22:28:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 325. [2021-06-05 22:28:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4753086419753085) internal successors, (802), 324 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 802 transitions. [2021-06-05 22:28:15,943 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 802 transitions. Word has length 20 [2021-06-05 22:28:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:15,943 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 802 transitions. [2021-06-05 22:28:15,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 802 transitions. [2021-06-05 22:28:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:15,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:15,943 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:16,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18799 [2021-06-05 22:28:16,144 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1753878175, now seen corresponding path program 741 times [2021-06-05 22:28:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:16,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095303826] [2021-06-05 22:28:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:16,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:16,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095303826] [2021-06-05 22:28:16,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095303826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:16,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801816836] [2021-06-05 22:28:16,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:16,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:28:16,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801816836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:17,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:17,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 22:28:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966629250] [2021-06-05 22:28:17,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:17,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:17,036 INFO L87 Difference]: Start difference. First operand 325 states and 802 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:18,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:18,249 INFO L93 Difference]: Finished difference Result 573 states and 1249 transitions. [2021-06-05 22:28:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:18,250 INFO L225 Difference]: With dead ends: 573 [2021-06-05 22:28:18,250 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 22:28:18,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1281.6ms TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 22:28:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 327. [2021-06-05 22:28:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.48159509202454) internal successors, (809), 326 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 809 transitions. [2021-06-05 22:28:18,254 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 809 transitions. Word has length 20 [2021-06-05 22:28:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:18,254 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 809 transitions. [2021-06-05 22:28:18,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 809 transitions. [2021-06-05 22:28:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:18,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:18,254 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:18,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18845,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:18,455 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1053385187, now seen corresponding path program 742 times [2021-06-05 22:28:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:18,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262922882] [2021-06-05 22:28:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:18,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:18,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262922882] [2021-06-05 22:28:18,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262922882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:18,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890174834] [2021-06-05 22:28:18,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:18,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:18,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890174834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:19,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:19,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 22:28:19,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287818515] [2021-06-05 22:28:19,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:19,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:19,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:19,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:19,260 INFO L87 Difference]: Start difference. First operand 327 states and 809 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:19,924 INFO L93 Difference]: Finished difference Result 570 states and 1244 transitions. [2021-06-05 22:28:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:19,924 INFO L225 Difference]: With dead ends: 570 [2021-06-05 22:28:19,925 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 22:28:19,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 807.6ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:28:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 22:28:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 328. [2021-06-05 22:28:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.4862385321100917) internal successors, (813), 327 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 813 transitions. [2021-06-05 22:28:19,928 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 813 transitions. Word has length 20 [2021-06-05 22:28:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:19,928 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 813 transitions. [2021-06-05 22:28:19,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:19,928 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 813 transitions. [2021-06-05 22:28:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:19,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:19,929 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:20,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18880,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:20,129 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:20,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1549997473, now seen corresponding path program 743 times [2021-06-05 22:28:20,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:20,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408788944] [2021-06-05 22:28:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:20,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408788944] [2021-06-05 22:28:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408788944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105436255] [2021-06-05 22:28:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:20,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:28:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105436255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:21,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:21,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:28:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304700649] [2021-06-05 22:28:21,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:28:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:21,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:28:21,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:28:21,116 INFO L87 Difference]: Start difference. First operand 328 states and 813 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,334 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 22:28:22,505 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 22:28:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:22,656 INFO L93 Difference]: Finished difference Result 555 states and 1221 transitions. [2021-06-05 22:28:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:22,657 INFO L225 Difference]: With dead ends: 555 [2021-06-05 22:28:22,657 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 22:28:22,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1720.8ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:22,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 22:28:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 323. [2021-06-05 22:28:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.4751552795031055) internal successors, (797), 322 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 797 transitions. [2021-06-05 22:28:22,660 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 797 transitions. Word has length 20 [2021-06-05 22:28:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:22,660 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 797 transitions. [2021-06-05 22:28:22,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 797 transitions. [2021-06-05 22:28:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:22,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:22,661 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 747 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18931 [2021-06-05 22:28:22,861 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:22,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:22,861 INFO L82 PathProgramCache]: Analyzing trace with hash -18807645, now seen corresponding path program 744 times [2021-06-05 22:28:22,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708011606] [2021-06-05 22:28:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:23,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708011606] [2021-06-05 22:28:23,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708011606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:23,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622218002] [2021-06-05 22:28:23,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:23,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:28:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:23,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:23,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622218002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:23,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:23,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 22:28:23,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484330714] [2021-06-05 22:28:23,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:23,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:23,386 INFO L87 Difference]: Start difference. First operand 323 states and 797 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:24,194 INFO L93 Difference]: Finished difference Result 593 states and 1331 transitions. [2021-06-05 22:28:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:28:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:24,194 INFO L225 Difference]: With dead ends: 593 [2021-06-05 22:28:24,195 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 22:28:24,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 22:28:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2021-06-05 22:28:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.529585798816568) internal successors, (855), 338 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 855 transitions. [2021-06-05 22:28:24,198 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 855 transitions. Word has length 20 [2021-06-05 22:28:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:24,198 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 855 transitions. [2021-06-05 22:28:24,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 855 transitions. [2021-06-05 22:28:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:24,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:24,199 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:24,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18965,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:24,399 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:24,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1979980895, now seen corresponding path program 745 times [2021-06-05 22:28:24,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:24,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589028222] [2021-06-05 22:28:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:24,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589028222] [2021-06-05 22:28:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589028222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:24,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180482776] [2021-06-05 22:28:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:25,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180482776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:25,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:25,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 22:28:25,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700604479] [2021-06-05 22:28:25,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:25,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:25,279 INFO L87 Difference]: Start difference. First operand 339 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:26,087 INFO L93 Difference]: Finished difference Result 453 states and 1076 transitions. [2021-06-05 22:28:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:26,088 INFO L225 Difference]: With dead ends: 453 [2021-06-05 22:28:26,088 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 22:28:26,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1131.5ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:28:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 22:28:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 340. [2021-06-05 22:28:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-06-05 22:28:26,091 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-06-05 22:28:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:26,091 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-06-05 22:28:26,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-06-05 22:28:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:26,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:26,092 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:26,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19011,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:26,292 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1178882397, now seen corresponding path program 746 times [2021-06-05 22:28:26,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:26,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659540927] [2021-06-05 22:28:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:26,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659540927] [2021-06-05 22:28:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659540927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416149118] [2021-06-05 22:28:26,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:26,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:26,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:26,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416149118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:26,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 22:28:26,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819947052] [2021-06-05 22:28:26,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:26,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:26,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:26,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:26,923 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:27,493 INFO L93 Difference]: Finished difference Result 462 states and 1094 transitions. [2021-06-05 22:28:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:27,494 INFO L225 Difference]: With dead ends: 462 [2021-06-05 22:28:27,494 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 22:28:27,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 717.7ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:28:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 22:28:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 341. [2021-06-05 22:28:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.5323529411764705) internal successors, (861), 340 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 861 transitions. [2021-06-05 22:28:27,498 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 861 transitions. Word has length 20 [2021-06-05 22:28:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:27,498 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 861 transitions. [2021-06-05 22:28:27,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 861 transitions. [2021-06-05 22:28:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:27,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:27,498 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:27,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19058 [2021-06-05 22:28:27,699 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:27,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:27,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1419328545, now seen corresponding path program 747 times [2021-06-05 22:28:27,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:27,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900048076] [2021-06-05 22:28:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:27,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900048076] [2021-06-05 22:28:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900048076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265093677] [2021-06-05 22:28:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 751 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:27,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:28:27,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:28,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265093677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:28,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:28,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 22:28:28,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840388330] [2021-06-05 22:28:28,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:28,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:28,345 INFO L87 Difference]: Start difference. First operand 341 states and 861 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:29,032 INFO L93 Difference]: Finished difference Result 465 states and 1102 transitions. [2021-06-05 22:28:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:29,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:29,033 INFO L225 Difference]: With dead ends: 465 [2021-06-05 22:28:29,033 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:28:29,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 733.8ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:28:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:28:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 342. [2021-06-05 22:28:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.533724340175953) internal successors, (864), 341 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 864 transitions. [2021-06-05 22:28:29,036 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 864 transitions. Word has length 20 [2021-06-05 22:28:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:29,036 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 864 transitions. [2021-06-05 22:28:29,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 864 transitions. [2021-06-05 22:28:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:29,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:29,037 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:29,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19092,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:29,237 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2119821533, now seen corresponding path program 748 times [2021-06-05 22:28:29,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:29,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922036883] [2021-06-05 22:28:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:29,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922036883] [2021-06-05 22:28:29,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922036883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:29,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962845690] [2021-06-05 22:28:29,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 752 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:29,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:29,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962845690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:29,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:29,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 22:28:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853189237] [2021-06-05 22:28:29,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:29,972 INFO L87 Difference]: Start difference. First operand 342 states and 864 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:30,574 INFO L93 Difference]: Finished difference Result 477 states and 1122 transitions. [2021-06-05 22:28:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:30,575 INFO L225 Difference]: With dead ends: 477 [2021-06-05 22:28:30,575 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 22:28:30,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 784.0ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:28:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 22:28:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 343. [2021-06-05 22:28:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.538011695906433) internal successors, (868), 342 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 868 transitions. [2021-06-05 22:28:30,578 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 868 transitions. Word has length 20 [2021-06-05 22:28:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:30,578 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 868 transitions. [2021-06-05 22:28:30,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 868 transitions. [2021-06-05 22:28:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:30,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:30,579 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:30,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19139 [2021-06-05 22:28:30,779 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash -428236897, now seen corresponding path program 749 times [2021-06-05 22:28:30,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:30,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81243129] [2021-06-05 22:28:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:30,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81243129] [2021-06-05 22:28:30,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81243129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:30,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619660947] [2021-06-05 22:28:30,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 753 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:30,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:28:30,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:30,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:30,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:31,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619660947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:31,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:31,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 22:28:31,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438284202] [2021-06-05 22:28:31,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:31,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:31,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:31,371 INFO L87 Difference]: Start difference. First operand 343 states and 868 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:31,983 INFO L93 Difference]: Finished difference Result 465 states and 1104 transitions. [2021-06-05 22:28:31,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:31,984 INFO L225 Difference]: With dead ends: 465 [2021-06-05 22:28:31,984 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:28:31,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:28:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:28:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2021-06-05 22:28:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-06-05 22:28:31,987 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-06-05 22:28:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:31,987 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-06-05 22:28:31,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-06-05 22:28:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:31,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:31,988 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:32,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19186,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:32,188 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:32,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:32,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2043892067, now seen corresponding path program 750 times [2021-06-05 22:28:32,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:32,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418972211] [2021-06-05 22:28:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:32,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418972211] [2021-06-05 22:28:32,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418972211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:32,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136828424] [2021-06-05 22:28:32,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 754 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:32,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:28:32,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:32,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:32,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136828424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:32,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:32,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 22:28:32,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366456449] [2021-06-05 22:28:32,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:32,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:32,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:32,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:32,862 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:33,629 INFO L93 Difference]: Finished difference Result 520 states and 1189 transitions. [2021-06-05 22:28:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:33,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:33,630 INFO L225 Difference]: With dead ends: 520 [2021-06-05 22:28:33,630 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 22:28:33,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 882.0ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 22:28:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 343. [2021-06-05 22:28:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-06-05 22:28:33,634 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-06-05 22:28:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:33,634 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-06-05 22:28:33,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-06-05 22:28:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:33,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:33,634 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:33,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19232 [2021-06-05 22:28:33,835 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:33,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1803445919, now seen corresponding path program 751 times [2021-06-05 22:28:33,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:33,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077627740] [2021-06-05 22:28:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:34,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077627740] [2021-06-05 22:28:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077627740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330014881] [2021-06-05 22:28:34,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 755 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330014881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 22:28:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337787901] [2021-06-05 22:28:34,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:28:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:28:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:28:34,416 INFO L87 Difference]: Start difference. First operand 343 states and 866 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:35,193 INFO L93 Difference]: Finished difference Result 530 states and 1208 transitions. [2021-06-05 22:28:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:28:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:35,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:35,194 INFO L225 Difference]: With dead ends: 530 [2021-06-05 22:28:35,194 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 22:28:35,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:28:35,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 22:28:35,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 343. [2021-06-05 22:28:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-06-05 22:28:35,198 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-06-05 22:28:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:35,198 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-06-05 22:28:35,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-06-05 22:28:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:35,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:35,198 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:35,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19266,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:35,399 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1102952931, now seen corresponding path program 752 times [2021-06-05 22:28:35,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:35,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158756169] [2021-06-05 22:28:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:35,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158756169] [2021-06-05 22:28:35,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158756169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:35,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363274170] [2021-06-05 22:28:35,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 756 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:35,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:35,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:28:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:36,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363274170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:36,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:36,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 22:28:36,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863006624] [2021-06-05 22:28:36,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:28:36,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:28:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:28:36,098 INFO L87 Difference]: Start difference. First operand 343 states and 866 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:37,142 INFO L93 Difference]: Finished difference Result 510 states and 1174 transitions. [2021-06-05 22:28:37,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:28:37,142 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:28:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:37,143 INFO L225 Difference]: With dead ends: 510 [2021-06-05 22:28:37,143 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 22:28:37,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1120.5ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:28:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 22:28:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 340. [2021-06-05 22:28:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.533923303834808) internal successors, (859), 339 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 859 transitions. [2021-06-05 22:28:37,147 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 859 transitions. Word has length 20 [2021-06-05 22:28:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:37,147 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 859 transitions. [2021-06-05 22:28:37,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 859 transitions. [2021-06-05 22:28:37,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:28:37,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:37,147 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:37,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 756 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19300 [2021-06-05 22:28:37,348 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1500429729, now seen corresponding path program 753 times [2021-06-05 22:28:37,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:37,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303175893] [2021-06-05 22:28:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:37,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:37,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303175893] [2021-06-05 22:28:37,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303175893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:37,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404243722] [2021-06-05 22:28:37,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 757 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:37,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:28:37,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:28:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:37,974 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 22:28:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:38,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404243722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:38,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:38,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 22:28:38,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980922485] [2021-06-05 22:28:38,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:38,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:38,097 INFO L87 Difference]: Start difference. First operand 340 states and 859 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:38,727 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 Received shutdown request... [2021-06-05 22:28:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:39,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19334 [2021-06-05 22:28:39,038 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:28:39,039 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:28:39,041 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:28:39,041 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:28:39 BasicIcfg [2021-06-05 22:28:39,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:28:39,041 INFO L168 Benchmark]: Toolchain (without parser) took 849937.22 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 321.5 MB in the beginning and 311.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 166.9 MB. Max. memory is 16.0 GB. [2021-06-05 22:28:39,041 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:28:39,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 341.8 MB. Free memory was 321.5 MB in the beginning and 320.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:28:39,042 INFO L168 Benchmark]: Boogie Preprocessor took 27.63 ms. Allocated memory is still 341.8 MB. Free memory was 320.0 MB in the beginning and 318.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:28:39,042 INFO L168 Benchmark]: RCFGBuilder took 506.00 ms. Allocated memory is still 341.8 MB. Free memory was 318.9 MB in the beginning and 326.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:28:39,042 INFO L168 Benchmark]: TraceAbstraction took 849371.34 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 326.0 MB in the beginning and 311.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 168.5 MB. Max. memory is 16.0 GB. [2021-06-05 22:28:39,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory is still 322.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.24 ms. Allocated memory is still 341.8 MB. Free memory was 321.5 MB in the beginning and 320.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.63 ms. Allocated memory is still 341.8 MB. Free memory was 320.0 MB in the beginning and 318.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 506.00 ms. Allocated memory is still 341.8 MB. Free memory was 318.9 MB in the beginning and 326.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 849371.34 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 326.0 MB in the beginning and 311.3 MB in the end (delta: 14.8 MB). Peak memory consumption was 168.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (340states) and FLOYD_HOARE automaton (currently 23 states, 19 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 849306.7ms, OverallIterations: 774, TraceHistogramMax: 4, EmptinessCheckTime: 232.1ms, AutomataDifference: 358991.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28058 SDtfs, 43887 SDslu, 220448 SDs, 0 SdLazy, 276806 SolverSat, 9895 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 114691.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27376 GetRequests, 8567 SyntacticMatches, 1967 SemanticMatches, 16841 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93043 ImplicationChecksByTransitivity, 399466.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=353occurred in iteration=521, InterpolantAutomatonStates: 13946, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1755.3ms AutomataMinimizationTime, 773 MinimizatonAttempts, 66871 StatesRemovedByMinimization, 767 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2966.6ms SsaConstructionTime, 10547.4ms SatisfiabilityAnalysisTime, 307234.5ms InterpolantComputationTime, 27208 NumberOfCodeBlocks, 27208 NumberOfCodeBlocksAsserted, 2579 NumberOfCheckSat, 25678 ConstructedInterpolants, 1185 QuantifiedInterpolants, 354890 SizeOfPredicates, 5124 NumberOfNonLiveVariables, 61080 ConjunctsInSsa, 15928 ConjunctsInUnsatCore, 1530 InterpolantComputations, 18 PerfectInterpolantSequences, 2587/18411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown